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