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If the theoretical payload increases by the use of a third stage for an initially two stage rockets is 8-10%, which of the following values is a logical value for theoretical payload increase for the use of an additional fourth stage?

If the theoretical payload increases by the use of a third stage for an initially two stage rockets is 8-10%, which of the following values is a logical value for theoretical payload increase for the use of an additional fourth stage? Correct Answer 3 to 5%

An increase in the number of stages will help in the increase payload mass the vehicle can carry. But with the increase in the number of stages, the amount of additional payload mass the vehicle can carry will decrease. So, if 8-10% additional payload mass can be carried by the rocket using a third stage, then a fourth stage will have a payload increase of only about 3 to 5%.

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