Neave drove from Town N to Town P which was 623 km away. He started from Town N at an average speed of 76 km/h. He maintained this speed for 3 h before increasing it by 7 km/h for the rest of the journey to Town P.
- How long did he take to complete the whole journey?
- What was his average speed from Town N to Town P?
(a)
Distance of 1st part of the journey
= 3 x 76
= 228 km
New speed for rest of the journey
= 76 + 7
= 83 km / h
Remaining distance for rest of the journey
= 623 - 228
= 395 km
Time taken for rest of the journey
= 395 ÷ 83
= 4 h
Total time taken
= 3 + 4
= 7 h
(b)
Average speed of the whole journey
= 623 ÷ 7
= 89 km
Answer(s): (a) 7 h; (b) 89km/h