1.

A car takes 7 hours to cover a certain distance at the speed of 48 km per hour is this period is decreased buy current only 20 km per hour how much time will it take to cover the same distance

Answer»

distance it travelled be = x km                               time taken = 7 HOURS                               SPEED         =48 km/hwe know that d=st                      x=48(7)=336kmnow decreased speed = 48-20=28km/h                     distance=336km                      time=d/s                             =336/28=12 hours       THEREFORE it TAKES 12 hours



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