If the simple interest on a sum of Rs. P at 5% per annum for three years is thrice the simple interest received on Rs. Q at 7% per annum for four years, then find the relation between P and Q.

A. P = 5.6Q

B. Q = 2.1P

C. P = 4.8Q

D. Q = 3.1P

Answer: Option A

Solution(By Examveda Team)

$$\eqalign{ & \left( {\frac{{P \times 5 \times 3}}{{100}}} \right) = 3\left( {\frac{{Q \times 7 \times 4}}{{100}}} \right) \cr & P = Q \times \frac{{28}}{5} \cr & P = 5.6Q \cr} $$