Question

An athlete runs 5 rounds of the ground having a radius of 280 metres.How many  kilometres does the athlete run in all?​

Answer 1

Answer:

Mark me as a Brainlist plz

Step-by-step explanation:

Given :-

A ground has a radius of 280 meters

Perimeter of the ground =

$2\pi \: r \\ 2 \times \frac{22}{7} \times 280 \\ = > 2 \times 22 \times 40 = 1760 \\ = > 1760m$

Perimeter of the ground is 1760 m

1760 m = 1.76 km

Solving :-

1 round = 1.76 km

5 rounds = x km

cross multiply we get

$x = 1.76\times 5 \\ = > x =8 .8km$

so totally after 5 rounds an athlete runs 8.8 km