Meena, Neena and Raveena can knit a shawl in 6, 4 and 8 hours respectively. What portion of the shawl will they knit in 1 hours. If they work together ?

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Solution

Meena, Neena and Raveena can knit a shawl in 6, 4 and 8 hours respectively
Work Done by Meena in 1 hr $= \frac{1}{6}$
Work Done by Neena in 1 hr $= \frac{1}{4}$
Work Done by Raveena in 1 hr $= \frac{1}{8}$
Work done by all of them working together for 1 hr $= \frac{1}{6} + \frac{1}{4} + \frac{1}{8}$
$= \frac{4 + 6 + 3}{24}$
$= \frac{13}{24}$
Thus, $= \frac{13}{24}$ part of the shawl will be knitted by them working together

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