1.

A man sold 18 cots for Rs.16800, gaining thereby the cost price of 3 cots. Find the cost price of a cot.?

Answer»

800



Let the cost of ONE cot = X

Then CP of 18 cots = 18X; GIVEN, SP of 18 cots = 16800

Gain = 3x

i.e. 16800 – 18x = 3x and 21X = 16800; :. x= 800

So, the cost of one cot = 800.



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