A sum of money invested at a certain rate of simple interest per annum amounts to Rs720 in 4 years a...........

Quantitative Aptitude (MTS) Simple Interest

A sum of money, invested at a certain rate of simple interest per annum, amounts to Rs720 in 4 years and to Rs800 in 5 years.

The sum invested is:

This questions was previously asked in

SSC MTS 13th July 2022 Shift-3

Rs400

Rs600

Rs500

Rs360

Let’s break it down:

- In 4 years, the amount becomes Rs720.

- In 5 years, it’s Rs800.

- The difference for 1 year = Rs800 - Rs720 = Rs80. So, yearly simple interest is Rs80.

- In 4 years, total interest = 4 × Rs80 = Rs320.

- The original sum (principal) = Total amount after 4 years - Interest in 4 years = Rs720 - Rs320 = Rs400.

- Option 1: Rs400

- Option 2: Rs600 (too high)

- Option 3: Rs500 (not matching the calculation)

- Option 4: Rs360 (too low)

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