Cost price of a pen is 50 Rs. and that of notebook is 140 Rs. If pen is sold at 200% profit, then to purchase 10 such note books how many pens are required to sell if only profit money is used to buy notebooks?
A) 14
B) 18
C) 15
D) 20
Answer: A) 14
Explanation:
C.P. of 10 note books ⇒ 140 × 10 = 1400 Rs. Profit on selling one pen ⇒ 50×200/100 = Rs 100 Number of pen required ⇒ 1400/100 = 14
A cone is hollowed out of a solid wooden cube of side 7 cm. The diameter and height of the cone is same as the side of the cube. What is the volume of the remaining cube?
By increasing the price of entry ticket to a fair in the ratio 5:7, the number of visitors to the fair has decreased in the ratio 11:9. In what ratio has the total collection increased or decreased?