Sara is decorating a 22 cm × 7 cm rectangular sheet. She wants to cover its boundary with matchsticks. If each matchstick has a length of 1 cm, find the number of matchsticks required to cover the boundary.
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Answer:
154 matchsticks
Step-by-step explanation:
Boundary length (perimeter) = 22×7
= 154cm
Since each matchstick is 1cm long:
Number of matchsticks needed =
154/1 = 154
154 matchsticks
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