In a family, the consumption of wheat is 4 times that of rice. The total consumption of the two cereals is 80 kg. Find the quantities of rice and wheat consumed in the family.
16 kg rice and 64 kg wheat
Let rice = x, then wheat = 4x.
x + 4x = 80 ⇒ 5x = 80 ⇒ x = 16.
Wheat = 64.