a car travelling in a straight line at a speed of uniformly from 20 km per hr to 40km with an acceleration of 0.5 per send square whats the time taken and distance traveled during the interval
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Answer: Correct option is
B
24kmh
−1
Let distance from A to B be x
Time for travel from A to B= x/20
Time for travel from B to A= x/30
Hence,speed for total distance 2x is:
30
x
+
20
x
2x
=
5x
2x×60
=24 km\hr
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