Questions
A car covers the first half of the distance between the two places at . and another half at . The average speed of the car is
detailed solution
Correct option is B
As from the question, Average speed of the car, vav = Total distance travelled by the body (d) Total time taken t1+t2 …(i)So, now time taken in 1st half of the distance, t1= Time = Distance Velocity =d2×40⇒ t1 = d80 (∵ Distance =d2, velocity =40kmh-1 ) Time taken for 2nd half, t2=d2× Velocity So, t2=d2×60=d120 (∵ distance =d2, velocity =60kmh-1 ) Now, average velocity, vav=dd80+d120 [From Eq. (i}) =d×80×120200d=48kmh-1Talk to our academic expert!
Similar Questions
A man moves from home to market which is at a distance of 2 km with a speed of 3 kmph. Finding the market closed he instantly returns home with a speed 6 kmph. The average velocity of the man in the total journey is
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