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The angle of a sector of a circle is `90^(@)`. The ratio of the area of the sector and that of the circle is ______.A. `4:1`B. `3:1`C. `1:4`D. `3:1` |
Answer» Correct Answer - C `"Area of circle"=pir^(2)` `"Area of sector"=(90^(@))/(360^(@))xxpir^(2)` `"The required ratio "=(90^(@))/(360^(@))xxpir^(2):pir^(2)rArr(1)/(4):1` `rArr 1:4` |
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