Question

to double the profit from present 10% the present selling price of rs.100 will have to be increased approximately to​

Answer 1

It is given that present profit is 10% and present selling price is Rs 100.

we have to find the increment in selling price when profit is doubled.

we know, selling price = cost price + profit

⇒100 = cost price + 10% of cost price

⇒100 = cost price + 10/100 cost price

⇒100 = 11/10 cost price

⇒cost price = 1000/11

now newselling price = cost price + new profit

= cost price + 20% of cost price

= cost price + 1/5 cost price

= 6/5 cost price

= 6/5 × 1000/11

= 6000/55

= 109.09 ≈ 109.1 Rs

so increment in selling price = new selling price - initial selling price

= 109.1 - 100

= 9.1 Rs. ≈ 9 Rs (approximately)

so, selling price is increased by 9 Rs.