A man was travelling half of the total distance at a speed of 30 km/h and the rest distance at a speed of 50 km/h. What was the average speed of the man on his whole journey?

Question

RRB Paper · Accepted Answer

Average speed when distance covered is same = 2xy/(x + y)

Where, x = Speed for the first half

y = Speed for the remaining half

Average speed = 2 × 30 × 50/(30 + 50) km/hr

⇒ 3000/80 km/hr

⇒ 37.5 km/hr

∴ The average speed for the whole journey is 37.5 km/hr

A man was travelling half of the total distance at a speed of 30 km/h and the rest distance at a speed of 50 km/h. What was the average speed of the man on his whole journey?

40 km/hr

37.5 km/hr

42.5 km/hr

35km/hr

The correct answer is `No. 2: 37.5 km/hr`

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A man was travelling half of the total distance at a speed of 30 km/h and the rest distance at a speed of 50 km/h. What was the average speed of the man on his whole journey?

40 km/hr

37.5 km/hr

42.5 km/hr

35km/hr

The correct answer is No. 2: 37.5 km/hr

The correct answer is `No. 2: 37.5 km/hr`