Question
If `3sqrt(5) + sqrt(125)` = 17.88, then what will be the value of `sqrt(80) + 6sqrt(5)` ?
Answer: Option D
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`3sqrt(5) + sqrt(125)` = 17.88, `rArr` ` 3sqrt(5) + sqrt(25 xx 5)` = 17.88
`rArr` `3sqrt(5) + 5sqrt(5)` = 17.88 `rArr` ` 8sqrt(5)` = 17.88 `rArr` ` sqrt(5) `= 2.235.
`:.` `sqrt(80) + 6sqrt(5)` = `sqrt(16 xx 5) + 6sqrt(5)` = `4sqrt(5) + 6sqrt(5)` = `10sqrt(5)`
= (10 x 2.235) = 22.35
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