[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Here we go ~
Average speed of John's motorcycle is 50 km/h and he drives for 3 hours.
We have been asked to find the distance travelled by John in this tike interval.
So, let's apply the formula :
[tex] \qquad \sf distance = avg. \: speed \times time[/tex]
[tex]\qquad \sf \dashrightarrow \: d = 50 \times 3[/tex]
[tex]\qquad \sf \dashrightarrow \: d =150 \: km[/tex]
So, he travelled 150 km in 3 hours ~
