A's speed is twice B's speed. In a 100m race, how many metres start can A give B so that the race ends in a dead heat?

Correct Option - A

Explaination

For the race to end in a dead heat,

both A and B should reach the winning post at the same time.

A's speed is twice B's speed.

To run the same distance,

time taken by B=2*(time taken by A)

Time taken by B to run 100 m

= 2*Time taken by A to run 100 m

Time taken by B to run 50 m

= Time taken by A to run 100 m

Hence, A can give B a start of 50 m.