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
Answer: Option B

Submit Answer & Explaination

Earn Reward Points by submitting Detailed Explaination for this Question

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
Answer: Option D
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
Answer: Option B
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
Answer: Option A
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
Answer: Option B
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
Answer: Option B
Question 6.

  1. The side of a cube whose surface area is numerically equal to its volume is

Options:
  1.    6 unit
  2.    8 uniot
  3.    10 unit
  4.    12 unit
Answer: Option D