# Rajni and Mohini deposited ₹3000 and ₹4000 in a company at the rate of 10% per annum for 3 years and 2 1/2 years respectively. The difference of the amounts received by them will be

(a) ₹100

(b) ₹1000

(c) ₹900

(d) ₹1100

**Solution:**

Given, Rajni and Mohini deposited ₹3000 and ₹4000 in a company at the rate of 10% per annum for 3 years and 2 1/2 years respectively.

We have to find the difference between the amounts received by them.

__Interest__, I = P × R × T/100

Amount = Principal + Interest

Amount received by Rajni,

P = ₹3000

R = 10%

T = 3 years

I = 3000 × 10 × 3/100

= 30 × 10 × 3

= 900

Amount = 3000 + 900 = ₹3900

Amount received by Mohini,

P = ₹4000

R = 10%

T = 2 1/2 years = 5/2 years

I = 4000 × 10 × 5/100 × 2

= 40 × 10 × 5/2

= 20 × 10 × 5

= 200× 5

= 1000

Amount = 4000 + 1000 = ₹5000

Difference in amounts = 5000 - 3900

= ₹1100

Therefore, the required difference is ₹1100

**✦ Try This: **Sham and Dolly deposited ₹5000 and ₹8000 in a company at the rate of 14% per annum for 1 1/2 years and 3 years respectively. The difference of the amounts received by them will be

**☛ Also Check: **NCERT Solutions for Class 7 Maths Chapter 8

**NCERT Exemplar Class 7 Maths Chapter 7 Problem 17**

## Rajni and Mohini deposited ₹3000 and ₹4000 in a company at the rate of 10% per annum for 3 years and 2 1/2 years respectively. The difference of the amounts received by them will be (a) ₹100, (b) ₹1000, (c) ₹900, (d) ₹1100

**Summary:**

Rajni and Mohini deposited ₹3000 and ₹4000 in a company at the rate of 10% per annum for 3 years and 2 1/2 years respectively. The difference of the amounts received by them will be ₹1100

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