Question

Give an expression for speed of an athlete if he takes time 't' to go around a circular track of radius 'r'

Answer 1

2×pie(can be taken 3.14 or 22/7)×r
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t


speed equals to distance / time...
the distance is taken as the circumference of the circle...2pieR ....do place the formula in space of distance...divide by time...
get ur speed..