Nick drove from Town W to Town X which was 410 km away. He started from Town W at an average speed of 65 km/h. He maintained this speed for 3 h before increasing it by 10 km/h for the rest of the journey to Town X.
- How long did he take to complete the whole journey?
- What was his average speed from Town W to Town X?
(a)
Distance of 1st part of the journey
= 3 x 65
= 195 km
New speed for rest of the journey
= 65 + 10
= 75 km / h
Remaining distance for rest of the journey
= 410 - 195
= 215 km
Time taken for rest of the journey
= 215 ÷ 75
= 2 h
Total time taken
= 3 + 2
= 5 h
(b)
Average speed of the whole journey
= 410 ÷ 5
= 82 km
Answer(s): (a) 5 h; (b) 82km/h