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A typist uses a sheet measuring 20cm by 30cm lengthwise.If a margin of 2 cm is left on each side and a 3 cm margin on top and bottom, then percent of the page used for typing is

Correct Answer: 64%

Explanation:

Area of the sheet =  20 × 30 c m 2   


Area used for typing =  20 - 4 × 30 - 6 c m 2    


required % = 384 600 × 100 =64%


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