The thickness of a hollow metallic cylinder is 2 cm. It is 70 cm long
with outer radius of 14 cm. Find the volume of the metal used in
making the cylinder, assuming that it is open at both the ends. Also
find its weight if the metal weighs 8 g per cm3.
The radius and height of a cylinder are in the ratio 3:2 and its
volume is 19,404 cm3. Find its radius and height.
How many cubic metres of earth must be dug to construct a well 7
m deep and of diameter 2.8 m?
A square sheet of paper is converted into a cylinder by rolling it
along its side. What is the ratio of the base radius to the side of the
square?
A boy is cycling such that the wheels of the cycle are making 140
revolutions per hour. If the diameter of the wheel is 60 cm, calculate
the speed in km/h with which the boy is cycling.
A running track has 2 semicircular ends of radius 63 m and two
straight lengths. The perimeter of the track is 1000 m. Find each
straight length.
There is a circular pond and a footpath runs along its boundary.
A person walks around it, exactly once keeping close to the edge. If
his step is 66 cm long and he takes exactly 400 steps to go around
the pond, find the diameter of the pond
The areas of two circles are in the ratio 49:64. Find the ratio of their
circumferences.
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