Question

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​

Answer 1

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