Home › UP Board Class 10 › mathematics › Areas Related to Circles › A circular park of radius 20 m is to be enclosed…
A circular park of radius 20 m is to be enclosed by fencing. The length of fencing needed is
A62.8 m
B125.6 m
C40 m
D20 m
Answer & Solution
Correct answer: B. 125.6 m
1. Circumference = 2 × pi × r = 2 × 3.14 × 20.
2. = 125.6 m.
3. Hence 125.6 m.
_Source: NCERT Class 10 Mathematics, Ch 11 "Areas Related to Circles", §11.2_
Related questions
A chord 16 cm long is drawn in a circle of radius 10 cm. The distance of the chord from thA wheel of diameter 84 cm makes 75 revolutions. The distance covered isA square is circumscribed about a circle of radius 7 cm. The area enclosed between the cirTwo concentric circles have areas in the ratio 1 : 4. The ratio of their radii isA circular field of radius 56 m has a path of width 7 m running around it. The area of theThe diameter of a wheel is 70 cm. The number of revolutions to go 11 km isA wire bent into a circle of radius 42 cm is now bent into a regular hexagon. The side of A circle is inscribed in an equilateral triangle of side 12 cm. The area of the region bet