Advertisements
Advertisements
प्रश्न
The cost of decorating the circumference of a circular lawn of a house at the rate of ₹ 55 per metre is ₹ 16940. What is the radius of the lawn?
Advertisements
उत्तर
Cost of decorating the circumference = ₹ 16,940
Cost of decorating per meter = ₹ 55
∴ Length of the circumference = `16940/55 "m"` = 308 m
Circumference of the circular lawn = 308 m
2 × πr = 308 m
`2 xx 22/7 xx "r"` = 308 m
r = `(308 xx 7)/(2 xx 22)`
r = 49 m
Radius of the lawn = 49 m
APPEARS IN
संबंधित प्रश्न
All the vertices of a rhombus lie on a circle. Find the area of the rhombus, if the area of the circle is 1256 cm2. (Use π = 3.14)
A square water tank has its side equal to 40m, there are 4 semicircular flower beds grassy plots all around it. Find the cost of turfing the plot at Rs 1.25/sq.m
The radius of a sector of a circle is 7 cm. If the measure of the arc of the sector is - three right angles; find the area of the sector in case.
Diagonal of a square is 20 cm. Find the length and perimeter of the square.
The area of a square is the same as the area of a square. Their perimeters are in the ratio
Find the area and perimeter of the following sector :
Radius= 4.2 cm, angle at the centre is 60 °
Each side of a square is 44 cm. Find its perimeter. If this perimeter is equal to the circumference of a circle, find the radius of the circle.
The radius of the wheel of a bus is 0.7 m. How many rotations will a wheel complete while traveling a distance of 22 km?
Diameters of different circles are given below. Find their circumference (Take π = `22/7`)
d = 28 mm
A wire of length 1320 cm is made into circular frames of radius 7 cm each. How many frames can be made?
