Maths / Direct and Inverse Variation / Time and Work

QUESTION

6 men can complete the electric fitting in a building in 7 days. How many days are required if 21 men do the job?

 OPTIONS A. 1 day B. 3 days C. 2 days D. 2.5 days
Right Option : C

EXPLANATION
Explain TypeExplanation Content
Text

According to question

$\dpi{120} \\6 \; men\;can\;complete\;the\;electric\;fitting\;in\;a\;building=7\;days\\\\ 1 \; men\;can\;complete\;the\;electric\;fitting\;in\;a\;building=6\times 7=42\;days\\\\ 21 \; men\;can\;complete\;the\;electric\;fitting\;in\;a\;building=\frac{42}{21}=2\;days$

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