<PRE><B>Question 422797</B>
4 masons can build a 12 metres long wall in 4 days.
Find no. of man-days to build 1 meter
{{{(4*4)/12}}} = 1{{{1/3}}} man-days/meter
:
find how many masons are required to build the 27 metres long wall in 3 days?
:
Let m = no. of mason required
3m = 27*1{{{1/3}}}
3m = 27*{{{4/3}}}
cancel 3 into 27
3m = 9(4)
3m = 36
m = {{{36/3}}}
m = 12 masons required to build a 27 m wall in 3 days</PRE>