Question

the pocket money of david and sagar are in the ratio 10:8 if david has 30 more than sagar then pocket money of david is

Answer 1

Let pocket money of David =a, Sagar=b
a/b= 10/8= 5/4
a= 5/4*b
a=b+30 since David has 30 more than sagar
Using substitution ,
b+30=5/4*b
4b+120=5b
Therefore b=120
Hence davids pocket money is 120+30=150

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Answer 2

Let Pocket money of David = a, Sagar= b
a/b = 10/8 = 5/4
a = 5/4 *b
a = b + 30 Since David has 30 more than Sagar

Using Substitution,
b+ 30= 5/4*b
4b + 120 = 5b
Therefore b = 120
Hence Davids pocket money is 120 + 30 = 150.