At what profit percent must an article be sold so that by selling at half that price, there may be a loss of 30%?

A 25%

B 36%

C 40%

D 42%

Correct Answer: Option C

at 40% profit, if cost price 100 then selling price 140 tk half of selling price =140/2=70 then, loss=100-70/100x 100=30% so ,profit must be 40%