During a race Ali ran the first 300 metres in 2 mins 10 secs and the last 100 metres in 30 secs. What was his average speed in m/s?

I need a little help with this. I think I know the answer but I'm not sure if its correct. Please help me out.

Gotcha Jul 5, 2015

#2**+10 **

Hi Gotcha,

During a race Ali ran the first 300 metres in 2 mins 10 secs and the last 100 metres in 30 secs. What was his average speed in m/s?

$$\\\frac{300+100metres}{2min+40seconds}\\\\

=\frac{400metres}{120+40seconds}\\\\

=\frac{400metres}{160seconds}\\\\

=\frac{5metres}{2seconds}\\\\

=2.5\;m/s$$

Melody Jul 5, 2015

#2**+10 **

Best Answer

Hi Gotcha,

During a race Ali ran the first 300 metres in 2 mins 10 secs and the last 100 metres in 30 secs. What was his average speed in m/s?

$$\\\frac{300+100metres}{2min+40seconds}\\\\

=\frac{400metres}{120+40seconds}\\\\

=\frac{400metres}{160seconds}\\\\

=\frac{5metres}{2seconds}\\\\

=2.5\;m/s$$

Melody Jul 5, 2015