SSC (English Medium) Class 8Maharashtra State Board
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# Y Varies Directly as Square Root of X. When X = 16, Y = 24. Find the Constant of Variation and Equation of Variation. - SSC (English Medium) Class 8 - Mathematics

#### Question

y varies directly as square root of x. When x = 16, y = 24. Find the constant of variation and equation of variation.

#### Solution

It is given that y varies directly as square root of x i.e. $y \propto \sqrt{x}$

∴  $y = k\sqrt{x}$ , where k is constant of variation
When x = 16, y = 24.

$\therefore 24 = k \times \sqrt{16}$

⇒ 24 = 4k

⇒ k = 6
So, the equation of variation is $y = 6\sqrt{x}$

Thus, the constant of variation is 6 and the equation of variation is $y = 6\sqrt{x}$ .

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#### APPEARS IN

Balbharati Solution for Balbharati Class 8 Mathematics (2019 to Current)
Chapter 7: Variation
Practice Set 7.1 | Q: 5 | Page no. 36
Solution Y Varies Directly as Square Root of X. When X = 16, Y = 24. Find the Constant of Variation and Equation of Variation. Concept: Direct Variation.
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