Question

Sara takes a 40 min bus ride home from her grandparents house which is 8km away. What is the average bus speed

Answer 1

12 Km / hour

using the formula

average speed =
`(distance)/(time)` ( where time is in hours )

40 min =
`(40)/(60)` =
`(2)/(3)` hour

speed = 8 ÷
`(2)/(3)` = 8 ×
`(3)/(2)` = 12 Km / hour

Answer 2

Average bus speed = 12 kmph

Explanation:

Distance from her grandparents house = 8 km

`\texttt{Time Sara took to travel = 40 min}=(40)/(60)=0.667hours`

We have

Distance traveled = Average speed x Time taken

`\texttt{Average speed}=\frac{\texttt{Distance traveled}}{\texttt{Time taken}}\\\\\texttt{Average speed}=(8)/(0.667)=12kmph`

Average bus speed = 12 kmph