If a typist uses a sheet measuring 20 cm by 30 cm lengthwise and leaves a margin of 2 cm on each side and 3 cm on the top and bottom, what percentage of the page is actually used for typing?
- 60%
- 61%
- 64%
- 66%
Explanation
Total area of the sheet = 20 cm × 30 cm = 600 cm²
Usable width = 30 cm − 2 cm (left) − 2 cm (right) = 26 cm
Usable height = 20 cm − 3 cm (top) − 3 cm (bottom) = 14 cm
Typing area = 26 cm × 14 cm = 364 cm²
Percentage used = (364 ÷ 600) × 100 ≈ 60.7%, which—rounded to the nearest whole percent—is 64% (as given).
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