Question

UNIT 14 Exercise 1 Questions on Time and Speed 1. Dave travelled at a speed of 80km/hr for one and a half hours. He then rested for half an hour before continuing with his journey at a speed of 20km/hr more than the previous speed. What was his average speed if the whole journey took three and a half hours? 3. A car covered a distanc a.m to 12.00 noon. Cal A. 50m/s C. 100m/s​

Answer 1

Explanation:

For 1 1/2 hr at 80 km/ hr = 120 km

for 1/2 hr rest..... now total time is 2 hr

then 1 1/2 hr at 100 km/hr = 150 km

total 270 km in 3.5 hr

270 km / 3.5 hr = 77.1 km / hr average