Question

A bus is moving at a speed of 45 km/h. What is the speed ofthe bus in m/s?a) 1.25×10^1 m/sb) 1.5×10^3 m/sc) 2.5 m/sd) 1.5×10^2 m/s

Answer 1

`a)1.25\cdot10^1\text{ m/s}`

Step-by-step explanation

We want to convert the speed of the bus from kilometers per hour to meters per second.

To do this, multiply the speed in km/hr by 1000 and divide by 3600. That is:

`1\text{ km/hr}=(1000)/(3600)\text{ m/s}`

Therefore, we have that 45 km/hr is:

`\begin{gathered} (45\cdot1000)/(3600) \\ \Rightarrow12.5\text{ m/s}=1.25\cdot10^1\text{ m/s} \end{gathered}`

The answer is option A.