Question

The price of a box and a pen is Rs.60. The box was sold at a 40% profit and the pen at a loss of 10%. If the Shop keeper gains Rs.4 in the whole transaction, then how much is the cost price of Box?

• A. Rs. 10
• B. Rs. 30
• C. Rs. 20
• D. Rs. 40
• E. None of the Above

Answer 1

The correct option is C Rs. 20

Let the cost of the box be x, so the cost of pen will be (60-x)
$(1.4x+0.9(60-x\left)\right)=64\Rightarrow x=20$