Question

Three students are discussing a situation where a bicyclist travels at a steady 18.0 m/s for 10 minutes, then at 6.0 m/s for 20 minutes and finally at 12.0 m/s for 15 minutes along a straight level road. Students make the following contentions about the bicyclist's average speed for the overall trip:

Answer 1

Answer:10.667 m/s

Step-by-step explanation:

Given

For First half students travel for 18 m/s for 10 min

For second half students travel for 6 m/s for 20 min

For last half students travel for 12 m/s for 15 min

average Speed
`=(Distance)/(Time)`

`V_(avg)=(18* 600+6* 1200+12* 900)/(600+1200+900)`

`V_(avg)=(28800)/(2700)=10.667`