A vehicle travels 4   km with speed of 3   km   h - 1 and another 4   km with speed of 5…

A vehicle travels 4 km with speed of 3 km h-1 and another 4 km with speed of 5 km h-1, then its average speed is :
  1. 4.25 km h-1
  2. 3.50 km h-1
  3. 4.00 km h-1
  4. 3.75 km h-1

Solution

Average speed in this case is given by, 2vav=1v1+1v2

⇒2vav=13+15

⇒2vav=815

⇒vav=154=3.75 km h-1

Asked in: JEE Main 2023 (30 Jan Shift 2)

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