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Grade 8 - Mathematics
3.49 Circles Review
Fill in the blanks.
: The radius (r) of the smaller circle of a ring is _____ than the radius (R) of the bigger circle.
: The radius of a circular cricket field is 85 cm. A circular path of width 4 cm. is laid, outside the field. Find the area of the path.
2187.86 sq. cm
2187.43 sq. cm.
: Area of a circular park is 2464 sq. cm. Find the cost for levelling the circular path of width 1 cm. laid outside it at a cost of $1.85 per sq. cm.
: Find the area of a circle, if its circumference is 22 cm.
38.5 sq. cm.
37.5 sq. cm.
: Find the area of a circle, if its circumference is 176 cm.
2464 sq. cm.
2462 sq. cm.
: Find the area of a ring whose radii are 56 cm. and 42 cm.
4,123 sq. cm.
4,312 sq. cm.
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