IBPS PO Prelims Model Paper 3 with solutions

Mukesh invested a certain sum for 2 years in Scheme–A, offering compound interest (on an annual basis) at the rate of 20% per annum and earned an interest of Rs. 3520. He invested the amount received from Scheme–A in Scheme–B, offering simple interest at the rate of 18% for 4 years. What is the interest earned from scheme B?