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Mathematics

Ritu can knit sweater in 4 days and Manish can knit the same sweater in 6 days. If they together knit the same sweater, the number of days taken by them will be:

  1. 10 days

  2. 5 days

  3. 125\dfrac{12}{5} days

  4. 512\dfrac{5}{12} days

Direct & Inverse Variations

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Answer

Ritu's 1 day work = 14\dfrac{1}{4}

Manish's 1 day work = 16\dfrac{1}{6}

(Ritu + Manish)'s 1 day work = 14+16\dfrac{1}{4} + \dfrac{1}{6}

= 3+212\dfrac{3 + 2}{12}

= 512\dfrac{5}{12}

No. days taken by Ritu & Manish together to knit the same sweater = 1512=125\dfrac{1}{\dfrac{5}{12}} = \dfrac{12}{5}

Hence, option 3 is the correct option.

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