Question

Rambabu paper planes at rate of 20 planes for Rupees 1 if he gets profit of 20% How many planes did he buy in Rupees 1

Answer 1

Answer:

20 planes means 100%

100% is 20 than find 120% =?

(20*120)/100=24

so if Rambabu wants 20% profit he sold 24 planes in one rupees.

Answer 2

Given,

The selling price of 20 planes = Re. 1

Profit = 20%

To Find,

the number of planes he buys in Rupee 1 =?

Solution,

Let buy price or cost price of  20 planes be x

let number of planes bought in Re1 be y

Selling price  = Profit gain + Cost price

Re. 1 = 20% of x + x

1 = (20x + 100x)/100

100 = 120x

x = 100 / 120

x = 5 / 6

the buying price of 20 planes  = Re. 5 /6

the buying price of y plane  =  Re 1

By cross multiplying them, we get

20 / y = 5 / 6

y =20 * 6 /5

y  = 24 planes

Hence, Rambabu buys 24 planes in Re. 1.