Practice Test Discussion

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

$(\sqrt{746} \times \sqrt{93}) \times \sqrt{25} = ?$

[Syndicate Bank (PO), 2011]

1400

1410

1300

1390

1425

Explanation

Given,

$(\sqrt{746} \times \sqrt{93}) \times \sqrt{25} = ?$

It can be approximated as

= $\begin{array}{l} (\sqrt{729} \times \sqrt{100}) \times \sqrt{25} = ? \end{array}$

= 27×10×5=?

= 1350 ≈ 1390

$[∵ \sqrt{746} = 27 a n d \sqrt{100} = 25]$

Hence, Option D is correct.

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