Question

A cyclist completes two revolutions of a circular path of diameter 20 metre in half minute calculate the speed of the cyclist

Answer 1

Answer:

4.18m/s

Explanation:

Circumference of the circular track:

=2πr =2πd/2 = πd =62.83m

Total distance covered=2×62.83

=125.66m

Time taken =1/2 min = 1/2×60 seconds =30 sec

$speed = \frac{distance}{time} \\ \\ = \frac{125.66}{30} \\ \\ =4.18m {s}^{ - 1}$

I hope you are clear if not just comment me and mark me as the brainliest.

Answer 2

Answer: The speed of the cyclist is 4.18m/s

Explanation: $Speed\ of\ cyclist=Distance\ travelled/Time\ taken$

$Diameter\ of\ circular\ path=20m\\Time\ taken=30s\\Distance\ travelled=4\pi r=4\times 3.14\times 10=125.6m\\Speed\ of\ cyclist=125.6/30=4.18m/s$

Cyclist completes 2 revolutions means 2 times the circumference of circular path=$4\pi r$

Time taken is half a minute:$60/2=30s$

$Speed\ of\ cyclist=Distance\ travelled/Time\ taken$