Question

If you travel 85 km/hr how far will you travel in 30 sec #8

Answer 1

We have the next information

v=speed =85km/hr

t=30 sec

First we need to convert 85km/hr to m/s

`1(m)/(s)*\frac{1\text{ km}}{1000m}*(3600s)/(1hr)=3.6\text{ km/hr}`

the equivalence to convert km/hr to m/s is

1 m/s =3.6 km/hr

`(85)/(3.6)=23.611\text{ m/s}`

then we will use the next formula in order to know the distance

`v=(d)/(t)`

where v is the speed , d is the distance and t is time

In order to find the distance we need to isolate d of the formula above

`d=v\cdot t`

in our case

v=23.611 m/s

t=30 sec

we substitute the values

`d=23.611\cdot30=708.33\text{ m}`

The answer is 708.33 m