Question

Mariko's mother used ribbon to wrap

three birthday gifts. She had three
ribbons, and each was 9 feet long. She
used of the first ribbon, of the
3
second ribbon, and of the third 3
ribbon. How many feet of ribbon did she use?
A 21 feet
B 20 feet
19 feet
D 22 feet

Answer 1

Mariko's mother used 18 feet of ribbon in total.

First ribbon: Mariko's mother used 1/3 of the first ribbon. This means she used 1/3 * 9 = 3 feet.

Second ribbon: Mariko's mother used 2/3 of the second ribbon. This means she used 2/3 * 9 = 6 feet.

Third ribbon: Mariko's mother used the entire third ribbon. This means she used 3/3 * 9 = 9 feet.

By adding up the amount of ribbon used from each individual ribbon, we get the total amount of ribbon used:

3 feet (first ribbon) + 6 feet (second ribbon) + 9 feet (third ribbon)

= 18 feet

Therefore, Mariko's mother used 18 feet of ribbon in total.