Question

During first half of a journey a body travels with a speed of 40 km/hr and the next half it travels with a speed of 20 km/hr. Calculate the average speed of the whole journey.
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Answer 1

Answer:

30 is the average speed of the whole journey

Answer 2

Answer:

$speed \: during \: first \: half(v1) = 40km/hr. \\ \\ speed \: during \: second \: half(v2) = 20km/hr. \\ </h2><h2></h2><h2> Average speed= v1+v2 \\ </h2><h2> \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: / \ 2</h2><h2></h2><h2> \\ </h2><h2> \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 40 + 20 /2 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 60/2</h2><h2> \\ \: \: \: \: \: \: \: \: \: \: \: \: \: =30 km/hr. \\ \\ ☆☆☆☆☆☆☆☆☆☆☆☆☆$

✨ShreeTheShuttler✨