Answer:

So the formula for distance is:

Distance= {Rate}*{Time}

So we compute for the distance he traveled by walking and we get:

(if you are wondering how we got 4/3 we are expressing 1 hour and 20 minutes as 4/3 an hour)

5* \frac{4}{3} = \frac{20}{3}

Computing for the distance he traveled before his motorcycle broke down is\

30- \frac{20}{3} = \frac{70}{3}

Therefore he had traveled 

km before his motorcycle broke down