a sum was put at simple interest at a certain rate for 7 years had it been put at 2 % higher rate , it would have fetched 140 more . find the sum .
"difference in s . i . = p × t / 100 ( r 1 − r 2 ) ⇒ 140 = p × 7 x 2 / 100 ( ∵ r 1 - r 2 = 2 ) ⇒ p = 140 × 100 / 7 × 2 = 1000 answer c"
divide(140, multiply(divide(2, const_100), 7))