SOLUTION: a rectangular picture with dimension 20 cm by 15 cm is to be framed. What are the dimensions of the frame if it is 3 cm wide on each side? what is its perimeter?

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Question 629174: a rectangular picture with dimension 20 cm by 15 cm is to be framed. What are the dimensions of the frame if it is 3 cm wide on each side? what is its perimeter?


Answer by 303795(602) About Me  (Show Source):
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The frame will have a width of 15 cm plus 3 cm on each side = 15 + 3 + 3 = 21 cm. The length will be 20 cm plus 3 cm on each side for a total length of 20 + 3 + 3 = 26 cm.
The perimeter will be 2 (l + w)
= 2 x (21 + 26)
= 2 x 47
= 94 cm