Question

five square pieces each of side 3cm are cut from a rectangular board 9cm long and 7cm wide. What is the area of the remaining part of the board? ​

Answer 1

Answer:

18 cm²

Step-by-step explanation:

Area of five square piece:

3×3 cm²×5

45 cm²

Area of rectangular board:

9×7cm²

63 cm²

Remaining area

63-45 cm²

18 cm²

Answer 2

Answer:

18 cm²

Step-by-step explanation:

Length of the rectangular board = 9 cm

Breadth of the rectangular board = 7 cm

Area of rectangular board = I x b = 9 cm x 7 cm = 63 cm²

Area of each square piece = s² = 3² = 9 cm²

Area of 5 square pieces = 9 x 5= 45cm²

Area of remaining part = 63 - 45

= 18 cm²

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