If Rs. 16000 amounts to Rs. 17200 in 3 years, then the rate of interest is .....A4%B2.5%C6%D7%Answer: B. 2.5%Read Explanation:Interest=17200-16000=1200 R-(Interest x 100)/ (Principal x N) =(1200 x 100) /(16000 x 3) =2.5%