If it takes 9 people to collect 10 kg of wood in 12 hours. How long does it take 7 people to collect 7.5 kg of same wood?
If we plug the values of the left side
(9)(10/9)(12) = 10
120 = 10 is the final answer which is not correct
If we plug the values of the right side
(7)(7.5/7)(X) = 7.5
X = 1 is the final answer which I think is not correct too