Yogesh can run 1km in 6 min 20 s and Vijay can cover the same distance in 6 min 40 s . By what distance can Yogesh beat Vijay?

Clearly, Yogesh beats vijay by 20 s.
Distance covered by vijay in 400 s = 1000 m
[∵ 6 min 40 s = 400 s]
Distance covered by Vijay in 20 s = (1000/400) x 20 m = 50 m
∴ Yogesh beats Vijay by 50 m.