Question

A road is 4530 m long, correct to the nearest 10 metres. kirsty drove along the road in 205 seconds, correct to the nearest 5 seconds. the average speed limit for the road is 80 km/h. could kirsty's average speed have been greater than 80 km/h? you must show your working,

Answer 1

Kirsty's average speed could not have been greater than 80 km/h.

Step-by-step explanation:

To determine if Kirsty's average speed could have been greater than 80 km/h, we need to calculate her average speed. First, let's convert the road length to kilometers by dividing it by 1000: 4530m ÷ 1000 = 4.53km. Next, let's convert the time taken to hours by dividing it by 3600: 205s ÷ 3600 = 0.057h.

To find Kirsty's average speed, we divide the distance traveled by the time taken: 4.53km ÷ 0.057h = 79.47 km/h. Since this is less than 80 km/h, Kirsty's average speed could not have been greater than 80 km/h.