Question

Rakesh age 10% that of mohan's age and 20% that of shyam's age .what percentage of mohan's age is shyam's age

Answer 1

Let the age of Rakesh = x
Let the age of Mohan = y
Let the age of Shyam = z
 we know,
x = 10% of y
⇒x = ¹⁰/₁₀₀ * y
⇒x = y/10                                  (equation 1)

Also,
x = 20% of z
⇒x = ²⁰/₁₀₀ * z
⇒x = z/5                                     (equation 2)

Therefore by equations 1 and 2,
y/10 =   z/5 
⇒y/2 =   z
⇒y    =   2*z

Therefore, y is equal to twice of z i.e.
y = 200 % of  z