if a wheel rotates once along the ground and travels 3ft 3.3/8".how many times does it rotate in one mile.and if another wheel rotates once along the ground and travels 3ft how many times does it rotate in one mile.
2007-01-08 11:28:16 · 3 answers · asked by tugboat 4 in Science & Mathematics ➔ Mathematics
Let's start with the easier one.
If it travels 3 ft each rotation, and a mile is 5,280, then you need to divide.
5,280 / 3 = 1,760 revolutions.
For the harder one, you need to convert 3 ft 3 3/8 in into a single unit (feet), then do the division like before.
3/8 of an inch is 0.375.
3 3/8 of an inch is 3.375
And if you divide by 12 you get the number of feet:
3.375 / 12 = 0.28125 feet.
So 3 ft. 3 3/8 in. = 3.28125 feet.
If you take 5,280 feet (in a mile) divided by 3.28125 feet (per revolution) you get:
1,609.14 revolutions.
2007-01-08 11:34:13 · answer #1 · answered by Puzzling 7 · 1⤊ 0⤋
We know that 1 mile=5280 ft.
3 ft.3 3/8in =3ft 27/8in=3 27/(8X12) ft=3 9/32 or105/32 ft.
So in the first case it would rotate 5280/(105/32)
=5280X32/105=1609 times
In the second case it would be 5280/3 or 1760 times
k
2007-01-08 20:24:15 · answer #2 · answered by alpha 7 · 0⤊ 0⤋
urm - could it be 106987.....lol
2007-01-08 19:34:45 · answer #3 · answered by misyid 2 · 1⤊ 1⤋