Find the amount to be paid at the end of 3 years in each case:
(a) Principal = ₹1,200 at 12% p.a.
(b) Principal = ₹7,500 at 5% p.a.

Solution:

(a) Principal = Rs. 1,200 at 12% p.a.

Simple Interest = [Principal × Rate of interest (p.a.) × Time( in years)] /100

= (1200 × 12 × 3) / 100

= Rs. 432

Amount = Principal + Interest

= Rs. 1200 + Rs. 432

= Rs. 1632

So, the amount to be paid after 3 years will be Rs. 1632

(b) Principal = Rs 7,500 at 5% p.a.

Simple Interest = [Principal × Rate of interest (p.a.) × Time( in years)] / 100

= [7500 × 5 × 3] /100

= Rs. 1125

Amount = Principal + Interest

= Rs. 7500 + Rs. 1125

= Rs. 8625

So, the amount to be paid after 3 years will be Rs. 8625

☛ Check: NCERT Solutions for Class 7 Maths Chapter 8

Video Solution:

Find the amount to be paid at the end of 3 years in each case: (a) Principal = ₹1,200 at 12% p.a. (b) Principal = ₹7,500 at 5% p.a.

Class 7 Maths NCERT Solutions Chapter 8 Exercise 8.3 Question 9

Summary:

Amount to be paid at the end of three 3 years in each case: (a) Principal = ₹1,200 at 12% p.a. (b) Principal = ₹7,500 at 5% p.a. will be (i) Rs. 1632, (ii) Rs. 8625

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