Answers

2014-05-17T09:14:35+05:30
(d). 220m.
circumfrence of circle=2πr
r=10.i.e 2*3.14*10
=2*31.4 in 40 sec.
dist. covered into 1 sec=2*31.4/40=1.57.
dist covered into 120+20=140 sec=1.57*140=219.8
approx 220 m

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  • Brainly User
2014-05-17T09:22:17+05:30
R=10 m
circumference=2*22/7*r
                    =62.85 m
t=40 s
total time=2*60+20
             =140 s
distance ran=140*62.85/40
                  =219.975 m
                  =220 m
so,option(D)
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