A and B are two heavy steel blocks. If B is placed on the top of A, the weight increases by 60%. How much weight will reduce with respect to the total weight of A and B, if B is removed from the top of A?

1. 60%
2. 45.5%
3. 40%
4. 37.5%

Answer

Let the weight of A is 100 kg.

Then, when B is placed on top of A, weight = 100 + (60% of 100)

= 160 kg.

Now, if B is removed from top, then weight becomes 100 kg.

Reduction in weight = (160 - 100)/160 = 60/160

= 37.5%

The correct option is D.