A typist uses a paper 30cm x 15cm.He leaves a margin at 2.5cm at the top and the bottom and 12.5cm on either side. What percentage of paper area is approximately available for typing

Areas 11/03/2021

A. 65%
B. 70%
C. 80%
D. 60%

Explanation:

Total area =(30 x 15)Sq.cm =45 Sq.cm

Area used =[(30 – 1.25 x 2) x (15 -2.5 x2)]

=(27.5 x 10)Sq.cm =275 Sq.cm

Percentage of area used =(275/450 x 100)% =61.1%

= 60%(Approx.)

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