If 36 men can do a piece of work in 20 hours, in how mwny hours will15 men do it? Choices: A) 22 B) 48 C) 60 D) 88 E) 72
Explanation:   Let the required no of hours be x. Then   Less men , More hours (Indirect Proportion)   \inline \fn_jvn \therefore 15:36 ::20:x \inline \fn_jvn \Leftrightarrow (15 x X)=(36 x 20) \inline \fn_jvn \Leftrightarrow \inline \fn_jvn x=\frac{36\times 20}{15}=48   Hence, 15 men can do it in 48hours.   Answer: 48)48
<result>B</result>
If 36 men can do a piece of work in 20 hours, in how mwny hours will15 men do it?