Practice Test Discussion

What approximate value should come in place of the question mark (?) in the given questions?

$(\sqrt{7921} - \sqrt{2070.25}) \times \frac{1}{4} = ?$

[BOB (PO), 2008]

Explanation

Given,

$(\sqrt{7921} - \sqrt{2070.25}) \times \frac{1}{4} = ?$

It can also be approximated as

$= (\sqrt{7921} - \sqrt{2025}) \times \frac{1}{4} = ? = (89 - 45) \times \frac{1}{4} = 44 \times \frac{1}{4} = 11$

Hence, Option A is correct.

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