Ai Tong Sch 2009 P6 CA1 Math Paper 2 Q6

Zen had a piece of rectangular paper. He cut away 1/9 of the breadth and 2/5 of the length. Then he measured the remaining piece of rectangular paper. He found that the breadth to be 16 cm and the length to be 15 cm. Find the area of the original piece of paper.

Solution

Breadth

8/9 --> 16 cm

1/9 --> 16 cm divided by 8 = 2 cm

9/9 --> 9 x 2 cm = 18 cm

Length

3/5 --> 15 cm

1/5 --> 15 cm divided by 3 = 5 cm

5/5 --> 5 x 5 cm = 25 cm

Original area --> 25 cm x 18 cm = 450 square cm

Answer: 450 square cm

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