Question

A gardener plants 20 saplings in 5 days working 10 hours a day, then in how many days gardeners plant 60 saplings working 15 hours a day? (3 marks)

Answer 1

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

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

x=5×(60/20)×(10/15)=10

Therefore, 10 days have been required.

(1 mark)