Question

by selling 30 pens for rupees 150 Sarita loses 20% How much should he sell the pen to have a profit of 20%​

Answer 1

Answer:

cost of 1 pen 5rs

saritha loss 5×20/100×20/100

25 loss profit 75

Answer 2

Answer:

He need to sell for Rs.225 to gain a profit of 20%.

Given:

By selling 30 pens for rupees 150 Sarita loses 20%  

To find:

The price at which he should sell the pen to have a profit of 20%

Solution:

30 pens are sold for 150 rupees

Cost of 1 pen = $\frac{150}{30}$ = Rs.5

80% of x = 5

x =$\frac{(5\times 100)}{80}$

x = Rs.6.25 = original cost of the pen.

To sell the pen at a profit of 20%

120% $\times$6.25 = Rs.7.5

Hence, 30 pens have to be sold at 30 $\times$ 7.5 = Rs.225 to gain a profit of 20%.