Question

A boy reads 200 pages in 5 days studying 10 hours a day, then in how many days the boy reads 600 pages studying 15 hours a day?

• A. 11
• B. 10
• C. 15
• D. 14

Answer 1

The correct option is B 10

To read more pages, more days have been required, so it is in direct proportion. The multiplying factor is 600/200.

If more hours spend on reading, then less days will be required, so it is indirect proportion. The multiplying factor is 10/15.

x=5×(600/200)×(10/15)=10

Therefore, 10 days have been required.