1.

A certain sum is invested under simple interest for 9 years at a certain rate of interest. Had the rate of interest been 1% more, the interest for 9 years would have been Rs. 234 more. Find the sum.1. Rs. 35002. Rs. 26003. Rs. 25004. Rs. 3600

Answer» Correct Answer - Option 2 : Rs. 2600

Given:

A certain sum is invested under simple interest for 9 years at a certain rate of interest.

Had the rate of interest been 1% more, the interest for 9 years would have been Rs. 234 more.

Formula:

S.I = PRT/100

Where, P = Principal

R = Rate of interest

T = Time taken

Calculation:

Let the sum be P and rate of interest be r

[(P × r × 9)/100] + 234 = [P × (r + 1) × 9]/100

⇒ 234 = P × (9/100)

⇒ P = 234 × (100/9)

⇒ P = Rs. 2600

The sum is Rs. 2600



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