A) 65%
B) 70%
C) 80%
D) 60%
Correct Answer: A
Solution :
Area of original paper \[=30\times 15=450\,\,c{{m}^{2}}\] \[=2\left( 2.5\times 15 \right)+2(1.25\times 30)\] \[=2\times 37.5+2\times 37.5\] \[=75+75=150\,\,c{{m}^{2}}\] Area of paper available for typing \[=450-150=300\,\,c{{m}^{2}}\] \[\therefore \]Required percentage \[=\frac{300}{450}\times 100=66\frac{2}{3}%=65%\]You need to login to perform this action.
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