Direct and inverse proportion
Cost of each pump = Rs.500
So cost of 90 pump = = Rs.45000
So total money that Vikash had = Rs.45000
Discount on each pump = Rs.50
So cost of each pump after discount = Rs.500 - Rs.50 = Rs.450
So, number of pumps in Rs.45000 = = 10
Therefore Vikash can buy 10 pumps.
So cost of 90 pump = = Rs.45000
So total money that Vikash had = Rs.45000
Discount on each pump = Rs.50
So cost of each pump after discount = Rs.500 - Rs.50 = Rs.450
So, number of pumps in Rs.45000 = = 10
Therefore Vikash can buy 10 pumps.