NCERT Solutions for Class 8 Maths Chapter 8 Comparing Quantities Exercise 8.3

Ques. Find the Simple Interest and amount on ₹ 5000 for 6 months at the rate of 5% per annum.

Soln: Principal, P = ₹ 5000

Time period, T = 6 months = (½) year

Rate of interest (R) = 5% p.a.

Therefore, 

Simple interest (S.I.) 

= \(\frac{P * T * R}{100}\)

= \(\frac{5000 * 1 * 5}{2*100}\)

=₹125

Therefore, 

Amount to be paid after 6 months = Principal + Interest = ₹ 5000 + 125 = ₹ 5125.