The sum of weights of A and B is 80 kg. 50% of A's weight is 5/6 times the weight of B. Find the difference between their weights.

Answer: Option A

Solution

Answer: Option A

Solution:

$$\begin{array}{rl}& \text{A}+\text{B}=80\\ & \text{A}\times \frac{1}{2}=\frac{5}{6}\text{B}\\ & \frac{\text{A}}{\text{B}}=\frac{5}{3}\end{array}$$

$$\begin{array}{rl}& 8\text{unit}\to 80\text{ kg}\\ & 1\text{unit}\to 10\text{ kg}\\ & 2\text{unit}\to \boxed{20\text{ kg}}\end{array}$$