Question

an object travels at a speed of 60 m/s for first 20 secs,then at a speed of 50m/s for 15 secs and the 60 m/s for 10s.what is the average speed of the object?​

Answer 1

Step-by-step explanation:

s1 = 60 * 20 = 1200m

s2 = 50* 15 =750m

s3= 60*10 = 600m

average speed = total distance / total time

=1200+750+600/20+10+15

= 2550/45

= 56.67m/s