Question

The monthly income A and B are in ratio 13:11 and those B and C are in the ratio 6:7. If 10% of A's income is pess than 15% of B's income by Rs.42, find C'a monthly income?

Answer 1

Answer:₹15400

Step-by-step explanation:

Given that

Ratio of incomes of A and B is 13:11

Ratio of incomes of B and C is 6:7

Let incomes of A,B,C be a,b,c respectively.

a:b=13:11=78:66

b:c=6:7=66:77

Hence, a:b:c = 78:66:77

Let a=78k

b=66k

c=77k

10% of a is less than 15% of b by ₹42

15%b - 10%a = 42

15b/100 - 10a/100 = 42

15b-10a = 4200

15*66k - 10*78k = 4200

990k-780k = 4200

21k = 4200

k = 4200/21

k = 200.

C’s income is 77k= 77*200= ₹15400