jan 6,2011

A and B run a km and A wins by 1 min.
A and C run a km and A wins by 375 mtrs.
B and C run a km and B wins by 30 sec
Find the time taken by B to run a km.
A beats B by 60 sec
B beats C by 30 sec
Hence A beats C by 90 secs. But we are given that A beats C by 375 mtrs. i.e. C
covers 375 mtrs in 90 sec.
Hence, time taken by C to cover 1 km = (90/375)* 1000
                                                           = 240sec

Time taken by B to cover 1 km = 240 – 30 = 210 secs.