Interest Q.10

10A certain sum of money amounts to Rs 2500 in a span of 5 years and further to Rs 3000 in a span of 7 years at simple interest. The sum is

Option : D
Explanation : 2500 in 5th year and 3000 in 7th year.
So in between 2 years, Rs 500 has increased.
⇒ For a year 500/2 = 250
So, per year it is increasing Rs 250, then in 5 years
⇒ 250 × 5 = 1250
Hence, the initial amount must be 2500 – 1250
= Rs 1250.

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