Advertisements
Advertisements
प्रश्न
A circular field of radius 105 m has a circular path of uniform width of 5 m along and inside its boundary. Find the area of the path.
Advertisements
उत्तर
The radius of circular field, `r_1 = 105`m
Width of path = 50 m
∴ The radius of the inner circle, `r_2 = 105 - 5 = 100`m
Area of path = `pir_1^2 - pir_2^2`
= `22/7[(105)^2 - (100)^2]`
= `22/7(105 + 100)(105 - 100)`
= `22/7 xx 205 xx 5`
= `22550/7`m2
= `3221 3/7`m2
APPEARS IN
संबंधित प्रश्न
A circular flower garden has an area of 314 m2. A sprinkler at the centre of the garden can cover an area that has a radius of 12 m. Will the sprinkler water the entire garden? (Take π = 3.14)
Find the area of the quadrilateral ABCD in which AB = 42 cm, BC = 21 cm, CD = 29 cm, DA = 34 cm and diagonal BD = 20 cm.
In Figure 5, a circle is inscribed in a triangle PQR with PQ = 10 cm, QR = 8 cm and PR =12 cm. Find the lengths of QM, RN and PL ?
Find the area of the major segment APB of a circle of radius 35 cm and ∠AOB = 90°, as shown in the given figure.
Find the area of a ring whose outer and inner radii are respectively 23 cm and 12 cm.
The diameter of a wheel is 40 cm. How many revolutions will it make in covering 176 m?
A chord of a circle of radius 14 cm makes a right angle at the centre. Find the area of the sector.
The wheel of a cart is making 5 revolutions per second. If the diameter of the wheel is 84 cm, find its speed in km per hour. [Take `π = 22/7`.]
A bicycle wheel, diameter 56 cm, is making 45 revolutions in every 10 seconds. At what speed in kilometre per hour is the bicycle traveling?
The area of the circle is 154 cm2. The radius of the circle is ______.
