At a certain instant, an auto driver is driving at a speed of 30 km/h. Then he uniformly accelerates the auto after 2.5 minutes, the speed of auto becomes 60 km/h. What is the average speed of the auto?
What is the value of uniform acceleration during the given interval of time?
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Average speed = 45 km/hr
Explanation:
Given: At a certain instant, an auto driver is driving at a speed of 30 km/h. Then he uniformly accelerates the auto after 2.5 minutes, the speed of auto becomes 60 km/h.
Find: What is the average speed of the auto?
Solution:
For uniform acceleration, average speed = (1/2) [initial speed + final speed]
= (1/2) ( 30 + 60 )
= 1/2 * 90
= 45 kmph
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