MATH BY PK SIR
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Ratio Method :
8:9
x:y
________
4:5
x/y=9:10
10____1kg
9_____900gm✓✓
Successive method:
______12.5%____ _____+x%___
Overall =25%
So , 9/8×(1+x/100)=5/4
1+x/100=1+1/9
x=11.11%=+1/9
So quantity reduced=-1/10
10------1kg
9-------900gm✓✓
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P1*40% 3
------- ==----
P2*36% 7
P1/p2=27/70
97===19400
1====200
P2==70*200=14000
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320. : 400. = 4. : 5
9===108
4===48
5====60
320*3-48*2. : 400*3-60*2 : 108*2
864. :1080 : 108*2
8. :10:2
4: 5 : 1=10
10u==51840
4==>20736=a
5==>25920=b
1===>5184=c
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A. B. C
7*4+6*8. 4*5+10/3*7. 4*4
114---------65-------------24
203*80%=162.4
162.4*65/203=52
203=126875
52=32500✓✓
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100x_______+20%_______120x
100x-600___+30%___120x-400
(3/10)×100x-600=120x-400-100x+600
30x-180=20x+200
10x=380
120x=4560✓✓
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28.5*5/6=23.75
5,4 lcm=20
5=1
20=4
4=1
60=15
60+20)*3/4=60
Total c.p of 60 fresh =19
19=60
23.75=75
