Arithmetic

Simple & Compound Interest

Hard

The simple interest as a sum of money is $\frac{4}{5}$ of the principal. Find the rate of interest if both the rate of interest and time are numerically equal.

$4\sqrt{6}$ % P.A.

$4\sqrt{2}$ % P.A.

$4\sqrt{3}$ % P.A.

$4\sqrt{5}$ % P.A.

✅ Correct Option: 4

$SI = \frac{4P}{5} = \frac{P \times R \times T}{100}$ with $R = T$ . So $\frac{4}{5} = \frac{R^2}{100}$ , giving $R^2 = 80$ and $R = \sqrt{80} = 4\sqrt{5}$ %.

2024

A certain sum becomes ₹ 2,356 in 3 years and ₹ 2,660 in 5 years on simple interest. The value of sum is:

2025: 22 May Shift 1

In how many years will a sum of money double itself at 12.5% p.a., at simple interest?

2023: 1 June Shift 1

A certain sum becomes $\frac{36}{25}$ of itself after 2 years on compound interest. Find the rate of interest per annum.

2025: 28 May Shift 2

A certain amount, when put at a compound rate of interest, becomes double in 5 years. In how many years will the amount become eight times?

2026: 24 May Shift 1

At what rate of compound interest per annum, a sum of Rs 1800 becomes Rs 2178 in two years?

2023: 21 May Shift 1

What sum of money will amount to Rs. 520 in 5 years and to Rs 568 in 7 years on simple interest?

The simple interest as a sum of money is 45\frac{4}{5}54​ of the principal. Find the rate of interest if both the rate of interest and time are numerically equal.

Solution

Related questions:

Keyboard Shortcuts

CUET General Test Past Year Questions (Topic-Wise)

The simple interest as a sum of money is $\frac{4}{5}$ of the principal. Find the rate of interest if both the rate of interest and time are numerically equal.