Exercise Speed 8

1. Chloe and Velma cycled 6.5 km from their school to their community centre along the same route at the same time. Both of them did not change their speeds throughout their journey. When Chloe arrived at the community centre at 13 05, Velma was 2.5 km away from the community centre. If Velma cycled at a speed of 16 km/h, at what time did the two of them leave the school?

2. Kevin leaves his bakery at 6 50 a.m. to deliver some pastries to a hotel. If he drives at a constant speed of 80 km/h, he will reach the hotel on time. If he drives at a constant speed of 64 km/h, he will be 10 min late. At what time is Kevin supposed to deliver the pastries to the hotel?

3. At 7 30 a.m., a bus left Town P for Town Q at an average speed of 60 km/h. A car left Town Q 15 min later and headed towards Town P. The car reached Town P at 10 45 a.m. The bus reached Town Q at noon. What was the average speed of the car?

4. Town A and Town B are 450 km apart. A van travels at a constant speed of 80 km/h from Town A to Town B. At the same time, a lorry travels at a constant speed of 70 km/h from Town B to Town A. How far would the van have travelled when they meet?