Maths / Direct and Inverse Variation / Time and Work

QUESTION

18 men can do a piece of work in 20 days. In how many days can 30 men finish the same work ?

 OPTIONS A. 26 days B. 22 days C. 21 days D. 27 days
Right Option : D

EXPLANATION
Explain TypeExplanation Content
Text

$\\According \;to\;question\\\\ Let\;the\;number\;of\;days\;be\;n\\\\ 18\times 30=n\times 20\\\\ 540=20n\\\\ \Rightarrow n=\frac{540}{20}\\\\ n=27\;days$

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