What will come in plac

Question

What will come in place of question mark in each of the following questions .`sqrt(32.4/?) = 2`

Options:

A . 7

B . 7.8

C . 8.1

D . 8.3

Answer: Option C

Sol. Let `sqrt(32.4/x) = 2`

Then , `32.4/x = 4`

`hArr 4x = 32.4`

`hArr x = 8.1 `

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