a sum was put a simple interest at a certain rate for 7 years . had it been put at 2 % higher rate , it would have fetched rs . 350 more . the sum is :
"explanation : let the sub be rs . x and the initial rate be r % . then x ã — ( r + 2 ) ã — 7 / 100 â ˆ ’ x ã — r ã — 7 / 100 = 350 â ‡ ’ x ã — 2 ã — 7 / 100 = 350 â ‡ ’ x ã — 7 / 100 = 175 â ‡ ’ 7 x = 17500 â ‡ ’ x = 2500 answer : option a"
multiply(divide(divide(350, 7), 2), const_100)