номер 2, страница 102 - гдз по английскому языку 7 класс учебник Wetz, Styring

2 Check the meaning of the words in the box. Then read the information and answer the questions. distance time average speed calculate equation

To calculate average speed, you need the following equation:

distance time

= average speed

Example

Distance: a lap was 300 metres long.

4 x 300 metres = 1,200 metres

Time: Adams completed the 1,200 metres in 63 seconds

So, average speed:

1,200

63 = 19.05 metres per second (m/s)

To calculate average speed in kilometres per hour, use this equation:

Average speed in metres per second (m/s) x 3.6 = average speed in kilometres per hour (km/h)

1 Look again at the table in exercise 1. Calculate the average speed of Gollob, Olsen and Crump, in m/s.

2 Now calculate the average speed of all the riders in km/h.