Question

An object covers first 12m in 5s, next 20m in 8s and final 13m in 2s. calculate his average speed​

Answer 1

speed =distance/time

so,total distance =45

total time taken =15

45/15=3

so average speed =3m/s

Answer 2

Answer:

average speed =12+20+13/5+8+2

                         =45/15

                         =3 m/s

Explanation:

average speed=total distance /total time