Question

Rahul and harron age are on ratio 5:7 Four years later their ags Will be 56 find their present age

Answer 1

Ratio of present age of Rahul and Harron = 5:7 •••(given)

After 4 years, their ages(sum of ages) = 56years •••(given)

Suppose that, x is the common of ratio.

Thus,

• Present age of Rahul = 5x ••••••eq. 1
• Present age of Harron = 7x •••••eq. 2

After 4 years,

• Age of Rahul = (5x + 4) years. •••••eq. 3
• Age of Harron = (7x + 4) years. •••••eq. 4

Now, According to given question:

eq. 3 + eq. 4 = 56 years

→ (5x +4) + (7x + 4) = 56

→ 5x + 4 + 7x + 4 = 56

→ 12x + 8 = 56

→ 12x = 56-8

→ 12x = 48

→ x = 48/12

→ x = 4

Now,

Put value of x in eq. 1 & eq. 2 to find present age:

• Present age of Rahul = 5x = 5*4 = 20 years.
• Present age of Harron = 7x = 7*4 = 28 years.