Question

The ages of Hari and Harry are in the ratio 5:7. Four years from now the ratio of their ages will be 3:4. Find their present ages.

Answer 1

@Justin9529

Answer 2

Hari = 5x years old
Harry = 7x years old
(5x +4)/(7x +4) = 3/4 [cross multiply]
4(5x +4) = 3(7x +4)
20x +16 = 21x +12
16 -12 = 21x - 20x
4 = x

Hari = 5x years old = 5(4) = 20 years old
Harry = 7x years old = 7(4) = 28 years old

Check: (20+4)/(28+4) = 24/32 = 3/4 or 3:4

Answer 3

THANK you Sir