Question

find the principal that will amount to rs 729.60 at 7%per annum in 4 years.

Answer 1

A = P (1+rt)
729.60 = P (1+7/100 *4)
729.60 = P (1+7/25)
729.60 * 25 = P *( 25+7)
18240 = P * 32
P = 18240/32
P = 570

Answer 2

Hope this will help mate

A = P (1+rt)

729.60 = P (1+7/100 *4)

729.60 = P (1+7/25)

729.60 * 25 = P *( 25+7)

18240 = P * 32

P = 18240/32

P = 570