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The volumes of two cubes are in the ratio 27: 125, what shall be the ratio of their surface areas?

August 4, 2021July 11, 2019 by admin
The volumes of two cubes are in the ratio 27: 125, what shall be the ratio of their surface areas?

A. 6:25
B. 3:5
C. 9:25
D. 16:25
a13 : a23 = 27 : 125
a1 : a2 = 3 : 5
6 a12 : 6 a22
a12 : a22 = 9 : 25

Categories Mathematics Mcqs, Volumes

What is the length of the longest pole which can be kept in a room 12 m long, 4 m broad and 3 m high?

August 4, 2021July 11, 2019 by admin
What is the length of the longest pole which can be kept in a room 12 m long, 4 m broad and 3 m high?

A. 10 cm
B. 12 cm
C. 15 cm
D. 13 cm
d2 = 122 + 42 + 32 = 13

Categories Mathematics Mcqs, Volumes

Find the length of the wire required to go 15 times round a square field containing 69696 m2.

August 4, 2021July 11, 2019 by admin
Find the length of the wire required to go 15 times round a square field containing 69696 m2.

A. 15840 m
B. 16840 m
C. 15820 m
D. 15640 m
a2 = 69696 => a = 264
4a = 1056
1056 * 15 = 15840

Categories Mathematics Mcqs, Volumes

The edges of three iron cubes are 6cm; 8cm; 10cm respectively. A new cube was made by melting them. Find the edge of the new cube?

August 4, 2021July 11, 2019 by admin
The edges of three iron cubes are 6cm; 8cm; 10cm respectively. A new cube was made by melting them. Find the edge of the new cube?

A. 8 cm
B. 12 cm
C. 14 cm
D. 10 cm

Categories Mathematics Mcqs, Volumes

The area of the floor of a room is 20 m2 that of a longer wall 15 m2 and of the shorter wall 12 m2, find the edge of the new cube?

August 4, 2021July 11, 2019 by admin
The area of the floor of a room is 20 m2 that of a longer wall 15 m2 and of the shorter wall 12 m2, find the edge of the new cube?

A. 450 m3
B. 100 m2
C. 60 m3
D. 400 m3
lb = 20 ; lh = 15 ; fh = 12
(lbh)2 = 20 * 15 * 12 => lbh = 60 m3

Categories Mathematics Mcqs, Volumes

If the sides of two cubes are in the ratio 3: 1 the ratio of their total surface area is?

August 4, 2021July 11, 2019 by admin
If the sides of two cubes are in the ratio 3: 1 the ratio of their total surface area is?

A. 3:1
B. 8:1
C. 9:1
D. 12:1
a1 : a2 = 3 : 1
6 a12 : 6 a22 = 9: 1

Categories Mathematics Mcqs, Volumes

The edges of a cuboid are respectively 3cm, 4cm and 12 cm. Find the length of the diagonal of cuboid.

August 4, 2021July 11, 2019 by admin
The edges of a cuboid are respectively 3cm, 4cm and 12 cm. Find the length of the diagonal of cuboid.

A. 5 cm
B. 19 cm
C. 13 cm
D. 144 cm

Categories Mathematics Mcqs, Volumes

The edges of a cuboid are 4 cm, 5 cm and 6 cm. Find the volume of the cuboid?

August 4, 2021July 11, 2019 by admin
The edges of a cuboid are 4 cm, 5 cm and 6 cm. Find the volume of the cuboid?

A. 120 cm3
B. 120 cm2
C. 148 cm2
D. 15 cm3
4*5*6 = 120

Categories Mathematics Mcqs, Volumes

The edges of cuboid are 4 cm; 5 cm and 6 cm. Find its surface area?

August 4, 2021July 11, 2019 by admin
The edges of cuboid are 4 cm; 5 cm and 6 cm. Find its surface area?

A. 120 cm2
B. 148 cm2
C. 74 cm2
D. 15 cm2
2(4*5 + 5*6 + 4*6) = 148

Categories Mathematics Mcqs, Volumes

The edge of three cubes of metal is 3 dm, 4 dm and 5 dm. They are melted and formed into a single cube. Find the edge of the new cube?

August 4, 2021July 11, 2019 by admin
The edge of three cubes of metal is 3 dm, 4 dm and 5 dm. They are melted and formed into a single cube. Find the edge of the new cube?

A. 3 dm
B. 4 dm
C. 5 dm
D. 6 dm
 
33 + 43 + 53 = a3 => a = 6

Categories Mathematics Mcqs, Volumes
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