Question 339352
A runs round in 1 minute.

If B runs at the same speed as A , they will meet in 30 seconds.

If they have to meet in 20 seconds B has to run faster.

A would have covered 1/3 in 20 seconds

B has to cover 2/3 in 20 seconds for them to meet.

So, B has to run twice as fast as A ANSWER.