37. If amount on the principal of Rs 6,000 is written as 6000 (5 + 1 /100)^3 and compound interest payable half yearly, then rate of interest p.a. is _________ and time in years is _________. 000 is written as 6000 (5 + 1 /100)^3 and compound interest payable half yearly 37. If amount on [...]