A can run 250 m in 25 sec and B in 30 sec. How many metres start can A give to Bina km race so that the race may end in a dead-heat

A can run 250 m in 25 sec and B in 30 sec. How many metres start can A give to Bina km race so that the race may end in a dead-heat?

a) 133.33

b) 166.40

c) 155.55

d) 167.50

Sol:

Given: 

A can run 250 m in 25 sec and B in 30 seconds. 

Calculations: 

A can run 250 m in 25 seconds 

⇒A can run 1 km in 100 seconds 

Similarly B can run 1 km in 120 seconds 

Distance covered by B in extra 20 seconds