# Speed, Distance and Time

In this section we look at calculating distances and

times using the following formulae:

**Example Question 1**

Jane walks at an average speed of 5 kph on a journey of 15 km.

How long does the journey take?

To find a time, we need to divide distance by speed.

15 kilometers ÷ 5 kph = 3 hours

**Example Question 2**

Chris cycles at an average speed of 8 mph.

If he cycles for 6½ hours, how far does he travel?

To find a distance, we need to multiply speed by time.

8 mph × 6.5 hours = 52 miles

**Example Question 3**

Nikki has to travel a total of 35 kilometres. She travels the first 20 Km in 5 hours.

(a) What is her average speed for the first part of the journey?

To find average speed, we need to divide distance by time.

20 kilometres ÷ 5 hours = 4 kph

Her average speed is the same for the whole of her journey.

(b) How long does the whole journey take?

To find time, we need to divide distance by speed.

35 Kilometres ÷ 4 kph = 8.75 hours