14. Five square pieces each of side 3 cm are cut from a rectangular board 9 cm long and 7 cm wide.
What is the area of the remaining part of the board
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18cm2
area of rectangle board = Length*Breadth=
9cm×7cm = 63cm2
area of one square piece = S² = 3² = 9cm²
area of 5 square piece = 9 × 5 = 45cm²
area of remaining part = 63 - 45 = 18cm²
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