A) 19096 sq. mm
B) 47040 sq. mm
C) 13860 sq. mm
D) 21624 sq. mm
Correct Answer: A
Solution :
Area of shaded portion \[=\pi ({{R}^{2}}-{{r}^{2}})\] \[=\pi ({{224}^{2}}-{{210}^{2}})\] \[=\frac{22}{7}\,(224+210)\,(224-210)\] \[=\frac{22}{7}\,\times 434\times 14=19096\,sq.\,mm\]
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