Lily wants to send a Christmas card to her friend Mary.
She pastes a satin ribbon along the edges of the square card without overlapping.
She then uses 10 inches of the ribbon to tie a bow on top. Find the total length of the ribbon used by Lily.
A
10 inches
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B
20 inches
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C
40 inches
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D
30 inches
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Solution
The correct option is D 30 inches Length of the square card = 5 in
Length of the ribbon used to cover
1 edge of the card = 5 in
So, the length of the ribbon along all the edges of the card = Perimeter of the card = 5 × 4 = 20 in
Length of the ribbon used for tying the bow = 10 in
∴ Total length of the ribbon used by Lily = 20 + 10 = 30 in