in simple interest what sum amounts of rs . 1120 / - in 4 years and rs . 1200 / - in 5 years ?
for 1 year interest = 1200 - 1120 = 80 for 4 year 320 then sum = 1120 - 320 = 800 answer : c
subtract(1120, multiply(4, subtract(1200, 1120)))