1.

A car runs from Agartala to Udaipur at the speed of 40 km/hr and returns from Udaipur to Agartala at the speed of 60 km/hr. The average speed of the car in the journey is1. 48 km/hr2. 50 km/hr3. 43 km/hr4. None of the above

Answer» Correct Answer - Option 1 : 48 km/hr

Formula used

Average speed = 2xy/(x + y) where x and y are speed

Calculation

Speed from Agartala to Udaipur = x = 40 km/hr

Speed from Udaipur to Agartala = y = 60 km/hr

Average speed = (2 × 40 × 60)/(40 + 60)

⇒  4800/100 = 48 km/hr



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