QUANTessential👑

9) A =15 B =10 lcm(30) A=2 B=3 5×4=20 10/2 =5hr

8) A-B =60 B=x A=60+x 25×16= LA+LB 400 = 2x+60 340 =2x x=170 A= 230

A+5/B+5= 5/6 6A+30= 5B+25 6A-5B =-5 A =25 A+n =40 n=15

7) 100 |~30% 70% |~50% 35% 35%---10500 100% = ? 30000 = ram Shym = 30000×1.25= 37500

5) Cp=125 ×1.2 =150 Mp= 150 ×0.92 =138 Sp = 138 12= 112.5 1 = 9.375× 13 = 121.875

3) 5x /3×12 = 10/9 X = 8 month

4) 300-42=258 258----6 43----1 Milk : water 218 : 46 109 : 23

2) Lcm (30) P =2 Q=3 5×4=20 Rest = 10/2 = 5 hours

1) Sb/Ss = 4/1 Sd=x= 120/12 = 10/5 =2 Tu= 66/3x = 22/2 =11

Lcm(24) A =3 B=4 C=2 9×2=18 Remaining work = 24-18= 6/6 =1

A : B 3500×12 : 4000×6 +3500×6 70 : 75 14 : 15 15---3000 1-----200 29×200= 5800

20) 250+200/30 = 15 m/sec 9×5/18=2.5 250/ 12.5 = 20 sec

21 ) T Ds Us 10/3 : 5 2 : 3 S 3 : 2 Speed of boat : speed of current 3+2/2 : 3-2/2 5 : 1 5:1

📌Questions Asked in RRB PO PRE 2021 Held on 01-08-2021 Q1) Speed of boat in still water is four times that of speed of current and a boat can row 120 km downstream distance in 12 hours. Find the time taken by boat to cover 66 km distance in upstream. Q2) Pipe P can fill the tank in 15 hrs and pipe Q can fill it in 10 hrs. If both pipes are opened simultaneously and Pipe Q is closed after 4 hours. Find the time taken by pipe P alone to fill the remaining tank. Q3) Investment ratio of A and B in a partnership is 5:3. A left after X months and profit share of B is 10% less than that of A. Find the value of X. Q4) Mixture of milk & water 300 liters in the ratio of 5 : 1 . 42 ltr mix taken out and 3 ltr milk & 3 ltr water added to the mixture. Find final the ratio of milk & water Q5) An item is markup by 20% and 8% discount is given on that. If the discount is Rs 115.2 then find the profit earned on selling the item. Q6) 5 year hence, Age of A and B is 5 : 6. If present age of B is 31. Find after how many years age of A will be 40 years. Q7) Ram spend 30% salary in household expenses and 50% of remaining he give to his mother remaining he left Rs 10500. what is shyam salary if ram salary is 25% less than shyam salary. Q8) Sum of speed of train A and B is 25m/sec. They take 16 sec to cross each other while travelling in opposite direction. Length of B is 60m shorter than A. find length of train A? Q9) A and B can fill a tank in 15 and 10 mins respectively. A and b opened for 4 hr after that B is closed . In how many mins ,A will fill remaining tank?? Q10) Age difference of A & B is 10 years. A is elder than B. 10 years hence average age of A and B is 45 years ,what is the present age of B? Q11) A invested Rs 5000 and B invested Rs 2000 in a business. After 4 month a withdraw 2/5 of his initial money and b invested 1000 more. Out of annual profit Rs X in which a got Rs 11000. Find the value of X?? Q12) A's age 4 yrs ago is equal to B's age 6 yrs hence. 10 yrs hence, their average age will be 45 yrs. Find present age of B. Q13) A man invested ₹3200 @ 10%p.a. for 2 years on CI. He invested the interest received @15%p.a. SI for 3 yrs. Find the amount received by him after 3yrs. Q14) Speed of boat in still water is 4 times of the speed of stream. If the boat travels 120km in 12hrs downstream. Find time taken to cover 66km upstream ? Q15) When digits of a 2 digit number are interchanged, new no. is 54 more than original no. If sum of the digits is 10, find the original no. Q16) A container is having 20ltr of pure milk. X ltr of water is added to it, and 6 ltr of the new mixture is taken out. Now quantity of milk in the container is 16 ltr. Find X. Q17) What is the area of a square circumscribing a circle of perimeter 88cm ? Q18) A work is finished by A, B and C in 8 days, 6 days and 12 days respectively. All started work together and after 2 days A left the work. In how many day B and C will finish the work? Q19) A and B invested Rs 3500 and Rs 4000 in a business. B withdrew Rs 500 after 6 months, after an year if B gets profit share of Rs 3000. Find the total profit? Q20) Length of Train is 250 m and a platform is 200 m. If train cross platform in 30 sec. So in how much time it will cross a man who is running in same direction with 9 kmph speed? Q21) A boat travels a distance in 3 hr 20 min downstream and same distance in 5 hrs in upstream than find the ratio of boat in still water and current speed?

Solution ; X Y Z 11 13 6 t t+2 t+3 P = I×T = 13(t+2) 8 = 6(t+3)13 8t+16 = 6t+18 2t=2 t=1 X : Z 11 : 6×4 11 : 24

X , Y , Z started a business investing capital in ratio 11: 13 :6. Z invested for one year more than time Y invested for which in turn was 2year more than time X invested for. The ratio of profit of Y and Z is in ratio 13: 8. What is the ratio of profit of X and Z?? #Rrbpo2022

5-108 6-126 7-144 8-94 9-72 10-82 11-87 12-115

In a school ‘B' there are eight classes i.e., five to twelve. Total student in class six is 16.67% more than total students in class five while number of students in class nine is 33.33% less than that of students in class five. Total students in class five, six and nine together is 306.Total students in class seven is 18 more than total students in class six. Total students in school ‘B' is 84% more than sum of students in class five, six, seven & nine together. Total students in class twelve is 21 more than total students in class eight, while total students in class eleven is 7 less than total students in class eight. Total students in class ten is 33 less than total students in class twelve. 1. Total students in class seven & eight together is what approximately percent more than total students in class five & twelve together? 2. Find the difference between average of number of students in class five and six together and average of number of students in class seven and nine together. 3. Find the ratio between total number of students in class five and six together to total number of students in class seven and nine together? 4. If total students in class twelve of school C is 50% more than total students in class six of school B, then total students in class twelve of school C is what percent less than total students in class seven & nine together of school B?