A) 240 m
B) 540 m
C) 440 m
D) 375 m
Correct Answer: C
Solution :
[c] Slant height\[I=\sqrt{{{7}^{2}}+{{24}^{2}}}=\sqrt{625}=25m\] Area of the canvas used \[=\pi rI=\frac{22}{7}\times \text{7}\times \text{25}{{\text{m}}^{2}}\text{=550}\,{{\text{m}}^{2}}\] Length of the canvas\[=\text{ }\left( Area\text{ }\div \text{ }width \right)\] \[=\left( 550\div 1.25 \right)=440m.\]
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