Ravi is 12 years younger than Surya. Ravi’s age is 40% of the sum of his and Surya’s age. What will be Surya’s age 9 years hence ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 45
Let Surya’s age be s
Ravi’s age be r
s - r = 12 ---(1)
r = 0.4(r + s)
0.6r = 0.4s
0.6(s - 12) = 0.4s (From equation 1)
0.6s - 7.2 = 0.4s
0.2s = 7.2
s = 36 years
9 years from now the age will be = 36 + 9 = 45