Practice on>?

Question

The distance between two towns, A and B, is 100 km. Mr Paul drove from A to B at an average speed of v km/h.
Q1) Write down an expression, in terms of v, for the time, in hours, that he took to complete the journey from A to B.

On the return journey, his average speed was 6km/h greater than his speed from A to B.
Write down an expression, in terms of v, for
Q2) his speed for the journey from B to A,
Q3) the time, in hours, that he took for the journey from B to A.

Answer 1

distance = rate*time

1. From the formula above, you get time = distance / rate.
Since distance is 100 km, and rate is v km/hr, then the time t is:
t = 100/v

2. On the return trip, his new rate is v+6 km/hr.

3. The distance is still 100 km on the return trip, with the new rate of v+6.
Using the same formula above:
t = 100/(v+6)

Answer 2

q1, since time is distance/speed, t = 100/v

q2, speed = v+6

q3, t = 100/(v+6)