Question

who will solve this problem. (change the voice)​

Answer 1

The voice of the sentence will be changed as : The problem will be solved by whom?

• The question sentence is in the active form. The thing doing the action is the subject whereas the thing on which the action is done is the object in an active sentence.
• In a passive sentence, the thing which receives the action will be the subject and the thing which is doing the action will be the object.
• Hence, the problem will become the subject and whom will become the object to change the voice of the above question.

Answer 2

This problem will be solved by whom ?