THE ANSWER IS 18. Please explain how .
2007-01-26 19:56:01 · 4 answers · asked by Anonymous in Education & Reference ➔ Homework Help
you better ask a maths teacher
2007-01-26 20:07:31 · answer #1 · answered by mhoni 2 · 0⤊ 0⤋
I look at it by comparing values.
36 men : 140m : 21 days
x men : 50m : 21 days (it will be faster building something shorter... so 50/140 times 36 men = 12.857 men needed to build a 50m wall in 21 days)
y men : 50m : 18 days (will need more men to build same wall faster... so 21/18 times 12.857 men = 15 men)
Answer: 15 men
Hope that helps, I'm not sure how the answer is 18!
2007-01-27 05:41:09 · answer #2 · answered by swisshorizon 2 · 0⤊ 0⤋
you need more men to finish the job in 18 days
inverse property
the other is right property
x=36*21*140/(18*50)
x=118 men
2007-01-27 04:34:32 · answer #3 · answered by iyiogrenci 6 · 0⤊ 0⤋
I think the answer is 15, not 18.
2007-01-27 09:21:17 · answer #4 · answered by Sam the Man 3 · 0⤊ 0⤋