<PRE><B>Question 1187963</B>
Two Carpenters are building each a small dog house.
 Carpenter A started building his at 1 pm and ended at 5:30 pm.
A works for 4.5 hrs to complete his house
:
 Carpenter B, being a newbie is more slower than A by half.
Therefore B had to work 9 hrs to complete his house
:
 At what time must Carpenter B start building so that he can end at the same time
with A
A finished at 5:30 so B had to start 9 hrs before that to complete at the same time&gt;
Using the 24 hr clock, 5:30 Pm is 17:30. 17:30 - 9:00 = 8:30 Am, B must start
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