Two persons P and Q are 844 m apart. They both start cycling simultaneously in the same direction with speeds of 12 m/s and 8 m/s, respectively. In how much time will P overtake Q?

3 minutes and 31 seconds

Distance b/w P & Q = 844 m

Relative Speed = ( 12 - 8 ) = 4 m/sec

( when they moves in same direction)

Time taken by P to overtake Q =  \(\frac{844}{4}\) = 211 sec

SO , Time taken  by P to overtake Q is 3 minutes 31 seconds .