71. Find the length of canvas 1.25 m wide
required to build a conical tent of base
radius 7 metres and height 24 metres.
A. 440m B.520m
C. 180m D.250m
72.
|
What is the capacity of
the cylindrical tank?
|
I.
|
The area of the base is
61,600 sq. cm.
|
II.
|
The height of the tank
is 1.5 times the radius.
|
III.
|
The circumference of
base is 880 cm.
|
|
|
|
Only I and II
|
|
|
Only II and III
|
|
|
Only I and III
|
|
|
Any two of the three
|
|
|
Only II and either I or III
|
|
73. The heights of two right circular cones
are in the ratio 1 : 2 and the perimeters of their bases are in the ratio 3 :
4. Find the ratio of their volumes.
A.32 B.
23
C.5 D.None
74. A conical vessel, whose internal radius
is 12 cm and height 50 cm, is full of
liquid. The contents are emptied into a cylindrical vessel with internal radius
10 cm. Find the height to which the liquid rises in the cylindrical vessel.
A. 42 cm B. 24cm
C. 12 cm D.8 cm
75. If the radius of a sphere is increased by
50%, find the increase percent in volume and the increase percent in the
surface area.
A. 152% B.125%
C.25% D.225%
