Question

Li needs 15 pieces of string each 1/2 of a inch long.She cut a 6-inch piece of string into pieces that are each 1/2 of an inch long. How many more pieces of string does she need

Answer 1

Li need 3 more pieces of string

Solution:

Given, Li needs 15 pieces of string each
`(1)/(2)` of a inch long.

She cut a 6-inch piece of string into pieces that are each
`(1)/(2)` of an inch long.

Now, let us find how many pieces she got from 6 inch string.

`\text { Number of pieces }=\frac{\text { length of string available }}{\text { length of each string }}`

`=(6)/((1)/(2))=6 * (2)/(1)=6 * 2=12`

Then, she will get 12 pieces from 6 inch string.

Number of pieces she need more = total number of pieces she need – available pieces

= 15 – 12 = 3

Hence, she need 3 more pieces.