Test Index

MAT Exam 2021 Paper

Question Numbers: 128-130

DIRECTIONS (Qs. 128-130) : In each of these questions two quantities

A

and

B

are given. Compare the two quantities and mark answer as

(a) if Quantity A is greater than Quantity B

(b) if Quantity B is greater than Quantity A

(d) if comparison cannot be made

Question : 129 of 200

Marks: +1, -0

=150

B. 45

Solution:

Concept:

The total surface area of a cube is given by

6a^2

, where

a

is the edge length.

Explanation:

Total surface area

= 150

So,

6a^2 = 150

Divide both sides by 6:

a^2 = 25

Taking the positive square root:

a = 5

Therefore, Quantity A (edge length)

= 5

Quantity B is given as

45

Since

45 > 5

, Quantity B is greater than Quantity A.

Answer:

Option (b) — Quantity B is greater than Quantity A.

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