Rambabu sells paper planes at the rate of 20 planes for Rs.1.If he gets profit of 20%,how many planes did he buy in 1 rupee?16402436

To find out how many planes Rambabu bought for 1 rupee, we first need to find out the cost price of each plane.

Given that he sells 20 planes for Rs.1, the selling price of each plane is 1/20 = Rs.0.05.

We also know that he makes a profit of 20%. This means that the selling price is 120% of the cost price.

So, 0.05 = 120/100 * cost price.

Solving this equation for the cost price gives us:

Cost price = 0.05 / (120/100) = Rs.0.04167 approximately.

Now, to find out how many planes he bought for 1 rupee, we divide 1 by the cost price of each plane:

Number of planes = 1 / 0.04167 = 24 planes approximately.

So, Rambabu bought approximately 24 planes for 1 rupee.