Question

A body travels such that it covers 1/3 rd of its total distance with speed 10m/s and another 1/3 rd with speed 20m/s.it covers remaining distance with speed 30m/s.find average speed

Answer 1

Answer:

Explanation:

Let total distance travelled be S,then time taken in its first S/3 part = t1 = S/3/10

Second S/3 part = t2 = S/3/20

Third S/3 part = t2 = S/3/30

Avg speed = total distance/total time taken

Solve and you are going to get your answer