Kuulchat - J.H.S / Grade 7 - 9 mathematics Circle Practice Test Questions

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CIRCLE

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1.

An athlete runs four times round a circular truck of radius 70 m. Finnd, in metres, the total distance covered by the athlete.

[Take π = $\frac{22}{7}$ ]

Show Solution

Distance covered per each cycle is the circumference of the circular truck.

Circumference of a circle

Circumference = 2 x π x radius

π = $\frac{22}{7}$ and radius = 70 m, so:

Circumference = 2 x $\frac{22}{7}$ x 70 m = 2 x 22 x 10 m = 440 m

Distance covered per round = 440 m

Total distance covered = 4 x 440 m = 1760 m

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