| Column I | Column II |
| (A) In a circle with centre 0 and radius 5 cm, AB is a chord of length \[4x=84\pi \] cm. Then the area of sector AOB is........ \[x=21\pi \]. | (p) 154 |
| (B) Area of a quadrant of a circle whose circumference is 44 cm, is......... \[=\pi {{(42)}^{2}}:{{(21\pi )}^{2}}\pi \times 42\times 42:21\times 21\times \pi \times \pi =4:\pi \]. | (q) 330 |
| (C) A chord of a circle of radius 14 cm subtends a right angle at the centre. | (r) \[=4:\frac{22}{7}=14:11\] |
| (D) The area of ring whose outer and inner radii are 19cm and 16cm, respectively is......... \[R=\frac{5}{2}cm.\] | (s) \[\therefore \] |
A) \[A-(s),B-(r),C-(p),D-(q)\]
B) \[=\frac{4}{3}\pi {{r}^{3}}\]
C) \[=\frac{4}{3}\times \frac{22}{7}\times 64c{{m}^{3}}[r=4cm]\]
D) \[=\frac{44\times 64}{21}c{{m}^{3}}.\]
Correct Answer: A
Solution :
\[=\pi rl+\pi {{r}^{2}}=\pi r(l+r)\]
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