21
|
The
perimeter of one face a of cube is 20 cm. Its volume must be
|
A.
|
125
cm3
|
|
B.
|
400
cm3
|
|
C.
|
1000
cm3
|
|
D.
|
8000
cm3
|
22. In a shower, 5 cm of rain falls. The volume of water
that falls on 1.5 hectares of ground is:
A. 75 cu. m
B. 750 cu. m
C. 7500 cu. m
D. 75000 cu. M
View Answer With Explanation
23..Tbe volume of a wall, 5 times as high as it is broad
and 8 times as long as it is high, is 12.8 cu. metres. Find the breadth of the
wall.
A. 17
B.40
C.180
D.None Of These
24.A hall is 15 m long and 12 m broad. If the sum of the
areas of the floor and the ceiling is equal to the sum of the areas of four
walls, the volume of the hall is:
A. 720
B. 900
C. 1200
D. 1800
View Answer With Explanation
25.How many bricks, each measuring 25 cm x 11.25 cm x 6
cm, will be needed to build a wall of 8 m x 6 m x 22.5 cm?
A. 5600 B.
6000
C.
6400 D. 7200
26.
|
A right triangle with sides 3 cm, 4 cm and 5 cm is rotated the side of
3 cm to form a cone. The volume of the cone so formed is:
|
|
|
12 cm3
|
|
15 cm3
|
|
|
16 cm3
|
|
20 cm3
|
|
27.A cube of edge 15 cm is imersed completely
in a rectangular vessel containing water. If the dimensions of the base of
vessel are 20 cm * 15 cm, find the rise in waer level.
A.15.5
B.11.25
C.25.1
D.18.6
28.
|
In a shower, 5 cm of rain falls. The volume
of water that falls on 1.5 hectares of ground is:
|
|
|
|
75 cu. m
|
|
750 cu. m
|
|
|
7500 cu. m
|
|
75000 cu. m
|
|
|
29. The perimeter of one face a of cube is
20 cm. Its volume must be
|
|
A. 125 cm3
|
B. 400 cm3
|
|
|
C. 1000 cm3
|
D. 8000 cm3
|
|
30..How many spherical bullets can be made out of a lead
cylinder 28 cm high and with base radius 6 cm, each bullet being 1.5 cm ub
duaneter?
A. 2015
B.1217
C. 1792
D.5056
