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11. The large hand of a big clock is 3m long. How
many cms. does its end move in 10 minutes ?
Solution
In 60 minutes, the minute hand (big hand) turns through 3600.
12. A Horse is tied to a port by a rope 8.1 meters long. If the
horse moves, always keeping the rope tight, Find the distance it
will cover when it traces an angle of 700
Solution
13. From a circle of radius `a', a sector containing
a central angle of 600 has been cut off, and the remainder is folded
over to form a right circular cone, find the radius of the base
of the cone.
Solution
As shown in the adjoining fig. A sector of central angle 600
is cut off from the circle, then the remaining larger sector has
central angle
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