Q no.17 Ili
per hour ?
16. A wheel ofa cart is making 4 revolutions per second
H. If the diameter of the wheel is 84 cm, find its speed
TV-fig. 17.07 shows a running
track in which AF = CD= 100
m and FED and ABC are semi-
circles whose diameters FD
and AC are equal. How much
will an athlete run in taking one
complete round of the track ?
18 A circular field has a perimeter
of660 m. A plot in the shape of
a s uare having its vertices on
70 m
100m
100
70m
c
Fig. 17.07
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