1.

A thief drives his motorcycle at a speed of x km/hr. The Policemen started chasing him in a jeep after 4hours and catches in 4 hours. If the average speed of jeep of policemen is 40 km/hr, then calculate thespeed in km/hr for the thief's motorcycle​

Answer»

Given :

Speed of motorcycle = X km/hr

Speed of JEEP of policemen = 40 km/hr

Policemen started chasing thief after 4 hour and catches the thief in 4 hour.

To FIND :

Speed of motorcycle.

Solution :    

When policemen catches the thief jeep then distance traveled by both thief and policemen will be same.

Time TAKEN by thief = 4+4 = 8 hour

Distance traveled in hour hour = x×8 = 8X km

Time taken by policemen = 4 hour

Distance traveled by policemen jeep = 4×40 = 160 km

As both the distance is same

Therefore 8x=160

x = 20 km/hr

So speed of thief will be 20 km/hr



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