Question

A certain sum amounts to Rs 6225 in 6 months and Rs 7125 in 2.5 years in simple interest. Find the sum and the rate of interest per annum.​

Answer 1

Answer:

By the using formula, we get

Simple Interest = Amount - Principal

⇒ Simple Interest = 1800 - 1250 = 550

⇒ Simple Interest = (P × R × T)/100

⇒ 550 = (1250 × R × 4)/100

⇒ R = (550 × 100)/(1250 × 4) = 11