Question

An athlete runs around a circular park 10times. If the diameter of park is 280km..find the distance covered by the athlete in kilometres

Answer 1

radius=140 km
perimeter=2×22÷7×140
=880km
total path=10×perimeter
=10×880
8800km

Answer 2

diameter=280
 radius=280/2
            =140
circumference of park= 2πr
                                      2 x 22/7 x 140
                                    =880
 as athlete ran 10 times therefor
                                                   =880 x 10
                                                   =8800 km