Question

A cyclist is practicing for a competition in a circular ground. He starts from the main gate and reaches the other end of the ground that is 4km away. Calculate the displacement of the cyclist.​

Answer 1

Step-by-step explanation:

Given A cyclist is practicing for a competition in a circular ground. He starts from the main gate and reaches the other end of the ground that is 4km away. Calculate the displacement of the cyclist.

So we have radius and circumference of the circle. We need to find the displacement.

So Circumference will be 2 x 4 km (since the other end is 4 km away)

                           So C = 8 km

Now radius of the circle is R = C/2π

                                              = C / 2 x 3.14

                                              = C / 6.28

                                              = 8 / 6.28

                                                = 1.27 km

Therefore the displacement of the cyclist is 2 r

                                                                 = 2 x 1.27

                                                                = 2.54 km

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