Question

a body travels along a straight line with speed 30m/sec and 60 m/sec for equal intervals of time its average speed is​

Answer 1

Explanation:

Let total time be 2t

distance travelled in first time period 't' = 30t m/sec

distance travelled in second time period 't' = 60t m/sec

Average speed = Total distance/Total time

= (30t+60t)/2t

=90t/2t

=45m/sec