Elijah drove from Town V to Town W which was 370 km away. He started from Town V at an average speed of 65 km/h. He maintained this speed for 3 h before increasing it by 5 km/h for the rest of the journey to Town W.
- How long did he take to complete the whole journey?
- What was his average speed from Town V to Town W?
(a)
Distance of 1st part of the journey
= 3 x 65
= 195 km
New speed for rest of the journey
= 65 + 5
= 70 km / h
Remaining distance for rest of the journey
= 370 - 195
= 175 km
Time taken for rest of the journey
= 175 ÷ 70
= 2 h
Total time taken
= 3 + 2
= 5 h
(b)
Average speed of the whole journey
= 370 ÷ 5
= 74 km
Answer(s): (a) 5 h; (b) 74km/h