change 21/4 to an improper fraction before calculating.
2007-08-26 11:55:39 · 12 answers · asked by firecrackergirl 1 in Science & Mathematics ➔ Mathematics
2 ¼ = 9 / 4
No. of pieces = 36 / (9 / 4) = 144 / 9 = 16
2007-08-26 21:18:40 · answer #1 · answered by Como 7 · 2⤊ 0⤋
To change 2 1/4 into improper fraction, multiply the 2 by the denominator and add the numerator so you get 9/4. Now divide 36 by 9/4 to know the number of pieces you can get.
36 / (9/4)
= 36 * (4/9)
= 16
so 16 pieces can be cut from the pipe
2007-08-26 12:01:26 · answer #2 · answered by Hamma 2 · 2⤊ 2⤋
whoa, confusion dudes.
assuming no loss of material in cutting :-)
2 1/4 x 4 = 9" multiplty by the divisor to get a whole number ,
9 is a factor of 36
36/9 = 4
so 4 x 4 = 16 pieces .
the other way
x = 36 / 2 1/4
x = 36 / 9/4
9/4 x = 36
9x = 36 * 4
x = 144/9
x = 16
2007-08-26 12:42:28 · answer #3 · answered by mark 6 · 0⤊ 1⤋
Its about 16 Pieces
wait ... is it 21 over 4 or 2 and 1/4
2007-08-26 12:01:49 · answer #4 · answered by ♥ Hakuna Matata ♥ 4 · 0⤊ 4⤋
36/9/4=36x4/9 (2 1/4=9/4)
divide 9 into 36 and multiply times 4.
2007-08-26 12:04:30 · answer #5 · answered by Ed S 4 · 0⤊ 2⤋
Total length of the pipe = 36 inches
The length of the required piece= 2 1/4 =2.25 inches
Hence, the number of pieces cut = 36 / 2.25 = 16 Ans.
ie. SIXTEEN pieces of the required length.
2007-08-26 13:39:55 · answer #6 · answered by Joymash 6 · 0⤊ 2⤋
36/(21/4)
= 36(4)/21
= 12(4)/7
= 48/7
= 6 & 6/7
just short of 7 pieces !!
2007-08-26 12:03:24 · answer #7 · answered by vlee1225 6 · 2⤊ 1⤋
No of pieces cut=36/(21/4)=36*4/21=6.85---
so 6 pieces ans
2007-08-26 12:03:55 · answer #8 · answered by MAHAANIM07 4 · 0⤊ 2⤋
36 / (2 1/4) = (36 * 4/4) / (9/4) = 144/4 * 4/9 = 144/9 = 16
2007-08-26 12:04:23 · answer #9 · answered by mechnginear 5 · 1⤊ 1⤋
Hamma is right.
16 pieces.
You now have sixteen little tiny 2-1/4 inch long pipes.
2007-08-26 12:03:59 · answer #10 · answered by Anonymous · 0⤊ 1⤋