Question

a horse trots in a circle at the end of a 4m rope. About how far does the horse trotted after completing ten circles?

Answer 1

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Find 1 round
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1 round of the circle = πD
1 round of the circle = π(2x4)
1 round of the circle =8π

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Find 10 rounds
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10 round of the circle = 8π x 10 
10 round of the circle = 80π
10 round of the circle = 251.33 m

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Answer: 251.33 m
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Answer 2

251.33m. First find the distance around one circle then times by ten for all the circles.
Circumference of each circle=2x(pi)xr
=2(Pi)x10
=25.13
For ten circles=25.13x10
=251.33