49. A car travels 30 km at a uniform speed 30 km/h and the next 30 km at a uniform
speed of 60 km/h. The average speed of the car is :
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Answer:
.......40kmph
Explanation:
.. time taken to cover first 30 km
= 30/30 = 1hr
.. time taken to cover 30 km
=30/60=1/2
=. 0.5hr
avg speed = total distance/ total time
avg speed= 30+30/1+0.5
avg speed= 60/1.5
avg speed= 40Kmph
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