Question

an athlete Run around a circle circular Park 10 times if the diameter of the park is 280 M find the distance covered by the athlete in kilometres

Answer 1

The given d=280 m
=2r=280m
r=140m
Then circumference=2πr
=2*22/7*140
=2*22*20
=880m
dist. covered in 1 round =circumference =880m
Then dist. covered in 10 round=880*10 =8800m =8800/1000 km =8.8 km

Answer 2

Hlo friend.. Cutiepie Here.

Here is ur answer :

Diameter d of Park = 280 m

Radius r of Park = d / 2 = 280/ 2 = 140 m

r = 140 m = 0.14km

Athlete take 10 rounds of Park

Distance for 1 Round =
$2\pi r$

$= 2 \times \frac{22}{7} \times 0.14$

$= \frac{6.16}{7} \: \: km$

$= 0.88\: \: km$

Distance covered in 10 rounds = 10 × 0.88

= 8.8 km

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HOPE IT HELPS YOU...

REGARDS
@sunita