Question

A gardner plants 20 saplings in 5 days working 10 hours a day, then in how many days the gardner plants 60 saplings working 15 hours a day?

• A. 12
• B. 10
• C. 8
• D. 15

Answer 1

The correct option is B 10

To plant more saplings, more days have been required, so it is in direct proportion. The multiplying factor is 60/20.

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

x=5×(60/20)×(10/15)=10

Therefore, 10 days have been required.