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CBSE Class 9 Answered

can u solve dis???my answer is comin wrong!!!
Asked by | 14 Jun, 2008, 02:54: PM
answered-by-expert Expert Answer

We know that speed = distance  / time

here distance  = circumference of the wheel = 2r

                                                                                = 2 x 3.14 x 0.8/2

                                                                                = 2 x 3.14 x 0.4

                                                                                = 2.512 m

time taken to complete one revolution = 1min =60 sec

so, speed = 2.512m / 60 sec

                  = 0. 042 m/s

Answered by | 14 Jun, 2008, 11:32: PM

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