<PRE><B>Question 289045</B>
If 12 carpenters can construct 3 homes in 20 days,
 how many days will it take 10 carpenters to construct 4 homes?
:
Find the number of man-days to construct 3 homes
12 * 20 = 240 man-days
:
Find the number of days to construct 1 home
{{{240/3}}} = 80 man-days
:
Let d = no. of days for 10 to build 4
:
10d = 4(80)
10d = 320
d = {{{320/10}}}
d = 32 days for 10 men to build 4 homes </PRE>