## Lakshya Education MCQs

Question:

1. A rectangular tank measuring 5 m by 4.5 m by 2.1 m is dug in the centre of a field 25 m by 13.5 m. The earth dug out is spread evenly over the remaining portion of the field. The level of the ground will be raised by

Options:
 A. 10 cm B. 15 cm C. 20 cm D. 25 cm

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## More Questions on This Topic :

Question 1.

1. The cost of a copper cube at 50 paise per cubic cm is Rs 864. The total surface area of the cube is

Options:
1.    664 cm2
2.    464 cm2
3.    666 cm2
4.    none of these
Question 2.

1. The total surface area of a cube is 1176 cm2. Its volume is

Options:
1.    1744 cm3
2.    2744 cm3
3.    3744 cm3
4.     none of these
Question 3.

1. Three cubes of metal whose edges are in the ratio 3 : 4 : 5 are melted down into a single cube whose diagonal is 12  cm. The edges of the three cubes are

Options:
1.    6 cm , 8 cm , 10 cm
2.    8 cm , 10 cm , 6 cm
3.    10 cm , 8 cm , 6 cm
4.    none of thes
Question 4.

1. Three cubes whose edges measure 3 cm, 4 cm and 5 cm respectively are melted to form a single cube. The surface area of the new cube is

Options:
1.    126 cm2
2.    216 cm2
3.    621 cm2
4.    612 cm2
Question 5.

1. The areas of three adjacent faces of a cuboid are x, y and z. If the volume is V, then

Options:
1.    V = xyz
2.    V2 = xyz
3.    V3 = xyz
4.    none of these