Question

Vinh has two wooden board. One board is 11 3/8 feet long and the other is 5 1/2 feet long. What is the difference in length of the boards?

Answer 1

Convert the mixed numbers to improper fractions, then find the LCD and combine.

Exact Form:
47/8

Decimal Form:
5.875

Mixed Number Form
5 7/8

Answer 2

Vinh has two wooden board. Difference of length of two boards is
`(47)/(8)` feet that is
`40(7)/(8)` feet.

Solution:

Given that

Vinh has two wooden boards

Length of one board =
`11(3)/(8)` =
`(91)/(8)`

Length of second board =
`5(1)/(2)` =
`(11)/(2)`

Difference of length of two boards = length of first board - length of second board

Difference of length of two boards =
`(91)/(8) - (11)/(2)`

On cross-multiplication we get,

`= (182 - 88)/(16)`

`= (94)/(16)`
`= (47)/(8)`

hence difference of length two boards is
`(47)/(8)` feet that is
`40(7)/(8)` feet.