PSLE Rachel had a rectangular piece of paper, 54 cm by 32.4 cm. She cut out as many squares as possible from the paper. The side of each square was 3 cm.
- How many squares did Rachel cut out?
- What area of the paper was left?
(a)
Number of squares that can be cut out breadthwise
= 32.4 ÷ 3
= 10 r 2.4
Number of squares that can be cut out lengthwise
= 54 ÷ 3
= 18 r 0
Total number of squares
= 18 x 10
= 180
(b)
Remaining breadth of the paper left = 2.4 cm
Area of the paper left
= 54 x 2.4
= 129.6 cm
2 Answer(s): (a) 180; (b) 129.6 cm
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