Myra cycles to a friend’s house 5 km away to deliver a packet. She goes at a speed of 12 km/hour and returns at a speed of 8 km/h. Her average speed during the whole trip is-
1
20 km/h
2
9.6 km/h
3
10 km/h
4
5 m/s
Myra cycles to a friend’s house 5 km away to deliver a packet. She goes at a speed of 12 km/hour and returns at a speed of 8 km/h. Her average speed during the whole trip is-