Question

For a science experiment, Mr.Barrows divided 1/2 cups of salt into small jars,each clothing 1/10 cup. If he has 1/9 cup of salt left over,how many jars dose he fill?

Answer 1

Number of jars filled is 3
`(8)/(9)` (approximately 4).

Explanation:

Initial amount of salt = 1/2 cup.

Amount of salt left = 1/9 cup.

Amount of salt used = 1/2 - 1/9

=
`(9-2)/(18)`

= 7/18

The size of each jar = 1/10 cup.

Amount of salt used = size of the each jar x number of jars filled

7/18 = 1/10 x number of jars filled

number of jars filled = 7/18 ÷ 1/10

= 7/18 x 10/1

= 70/18

= 3
`(8)/(9)`

= 3.9

The number of jars filled is approximately 4.