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Q.

An object travels 16 m in 4s and then another 16 min in 2 s. What is the average speed of the object?


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a

2.3 ms-1

b

4.43 ms-1

c

5 ms-1

d

5.33 ms-1 

answer is D.

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Detailed Solution

Given data in the problem,
Total distance covered by the object, s = 16 + 16 
=>s = 32 m Total time taken to covered the distance, t = 4 + 2 = 6 s
By using the formula of speed,
Average speed, vav = Total distance travelledTotal time taken
=>vav = 326 =>vav = 5.33  So, the average speed of the object is 5.33 ms-1.
                                               
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