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- A typist uses a paper 30 cm × 15 cm.
Question 1:
A typist uses a paper 30 cm × 15 cm. He leaves a margin of 2.5 cm at the top and the bottom and 1.25 cm on either side. What percentage of paper area is approximately available for typing? A. 65%
B. 70%
C. 80%
D. 60%
Feedback Total area = (30 × 15) cm2 = 450 cm2
Area used = [(30 - 1.25 × 2) × (15 - 2.5 × 2)]
=(27.5 × 10) cm2 = 275 cm2
Percentage of area used = [(275/450) × 100]% = 61.1% ~ 60% (approx..)
Area used = [(30 - 1.25 × 2) × (15 - 2.5 × 2)]
=(27.5 × 10) cm2 = 275 cm2
Percentage of area used = [(275/450) × 100]% = 61.1% ~ 60% (approx..)
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