<PRE><B>Question 1133773</B>
linear speed(v) = circumference of circle of radius r/time(t) = (2*pi*r)/t
:
i) r = 0, then v = 0 km/hr
:
ii) r = 5 cm
:
distance in 1 hour is (2 * pi * 5) * 4800 * 60 = 9047786.8423 cm is approximately 9047787 cm = 90477.87 m = 90.5 km/hr
:
iii) r = 6 cm
:
distance in 1 hour is (2 * pi * 6) * 4800 * 60 = 10857344.2108 cm is approximately 108.6 km/hr
:
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