If A can run 1 km in 3 minutes and 10 seconds and B can cover the same distance in 3 minutes and 20 seconds, by what distance can A beat B?

40 meters

50 meters

45 meters

None of these

To find the distance by which A beats B, we need to calculate the distance covered by B in the extra 10 seconds taken by B.

Since B covers 1 km in 3 minutes 20 seconds, B's speed is 1 km / 200 seconds.

In 10 seconds, B covers 10/200 km = 50 meters.

So, A beats B by 50 meters.