Jeremy drove from Town E to Town F which was 292 km away. He started from Town E at an average speed of 66 km/h. He maintained this speed for 2 h before increasing it by 7 km/h for the rest of the journey to Town F.
- How long did he take to complete the whole journey?
- What was his average speed from Town E to Town F?
(a)
Distance of 1st part of the journey
= 2 x 66
= 132 km
New speed for rest of the journey
= 66 + 7
= 73 km / h
Remaining distance for rest of the journey
= 292 - 132
= 160 km
Time taken for rest of the journey
= 160 ÷ 73
= 2 h
Total time taken
= 2 + 2
= 4 h
(b)
Average speed of the whole journey
= 292 ÷ 4
= 73 km
Answer(s): (a) 4 h; (b) 73km/h