Question

If the selling price of 10 pens is equal to the cost price of 14 pens, find the gain per cent.​

Answer 1

Answer:

GAIN = 40%

Step-by-step explanation:

Let the CP of 1 pen be Rs x

Then,

CP of 14 pens will be 14×x=14x

And

CP of 14 pens=SP of 10 pens

Hence,

SP of 10 pens =14x

Then,,

SP of 1 pen=14x÷10=1.4x

Gain=SP−CP.=1.4x−x=Rs0.4x

Gain(%)=

CP

gain

×100

=

x

0.4x

×100=40%