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If Sqrt784 = 28, Find the Value Of: Sqrt(7.84) + Sqrt(78400) - Mathematics

Sum

If `sqrt784` = 28, find the value of:

`sqrt(7.84) + sqrt(78400)`

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Solution

`sqrt784` = 28


∴ `sqrt7.84 = sqrt(784/100) = 28/10 = 2.8`

 

`sqrt78400 = sqrt(28 xx 28 xx 10 xx 10)`


= 28 × 10 = 280


`sqrt7.84 + sqrt78400 = 2.8 + 280 = 282.8`

Concept: Concept of Square Roots
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 3 Squares and Square Root
Exercise 3 (A) | Q 12.1 | Page 39
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