Direct and inverse proportion

Direct and inverse proportion Vikas has enough money to buy 90 pumps worth 500 each. How many more pumps can he buy, if he gets a discount 50 on each pump?

Cost of each pump = Rs.500
So cost of 90 pump = 90×500 = 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 = 45000450 = 10
Therefore Vikash can buy 10 pumps.

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