Problema Solution
After 1/6 of a barrel of rice was eaten, 10 kg of the rice was left. How many kg of rice would be left after 1/4 of it had been eaten?
Answer provided by our tutors
let x = kg of rice in the barrel
After 1/6 of a barrel of rice was eaten, 10 kg of the rice was left:
x(1 - 1/6) = 10
x(5/6) = 10 multiply both sides by 6/5
x = 10*6/5
x = 12 kg
After 1/4 of a barrel of rice was eaten there are
x(1 - 1/4) = (3/4)x = (3/4)12 = 9 kg of rice left.