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answer is option b 105 km/hrs by using relativity
hope answer is helpful
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speed of 1st car = speed of 2nd car = 30km/h
Let the speed of third car be x
Since the third car is moving in same direction
relative speed of third car = (x-30) km/h
Distance covered by third car in 4 minutes = 5km.
4 min = 1/15 hour
speed = distance/time
=> x-30= 5 divide by 1/15
=> x-30 = 15 into 5
=> x = 75+30
=> 105 km/h
Let the speed of third car be x
Since the third car is moving in same direction
relative speed of third car = (x-30) km/h
Distance covered by third car in 4 minutes = 5km.
4 min = 1/15 hour
speed = distance/time
=> x-30= 5 divide by 1/15
=> x-30 = 15 into 5
=> x = 75+30
=> 105 km/h
ya right
aa gya?
hanji
??
ok
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