Maths / Direct and Inverse Variation / Time and Work

QUESTION
 

20 men can build a wall in nine days,then how long would it take 12 men to build the same wall?

OPTIONS
A. 

12

B. 

9

C. 


6

D. 


15

Right Option : D

EXPLANATION
Explain TypeExplanation Content
Text

large According;to;question\ Amount ;of;wall ;built; by;20;men;in ;9;days = 1\ Amount ;of;wall ;built; by;1;man;in ;1;day=frac{1}{20 X 9};\ Amount ;of;wall ;built; by;12;men;in ;1;days=frac{12}{9 X 20} = frac{1}{15}\ No;of;days;=15\

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