Ben and each of his 9 friends deposited ₹37 every month in a bank for 12 years. How much did they save?
Total number of depositors = 10
Amount deposited every month = ₹37
Number of months in 12 years = 12 x 12 = 144
Amount saved in 12 years
= ₹(37 x 144 x 10) = ₹53,280