Advertisements
Advertisements
प्रश्न
Choose the correct alternative answer for the following question.
पर्याय
440 cm2
550 cm2
330 cm2
110 cm2
Advertisements
उत्तर
Radius of the cone, r = 7 cm
Height of the cone, h = 24 cm
Let l be the slant height of the cone.
\[l = \sqrt{r^2 + h^2} = \sqrt{7^2 + {24}^2} = \sqrt{49 + 576} = \sqrt{625}\] = 25 cm
∴ Curved surface area of the cone = \[\pi r l = \frac{22}{7} \times 7 \times 25\] = 550 cm2
APPEARS IN
संबंधित प्रश्न
The length of minute hand of a clock is 14 cm. Find the area swept by the minute hand in one minute. (Use π = 22/7)
The area of circle, inscribed in equilateral triangle is 154 cms2. Find the perimeter of
triangle.
Two circular pieces of equal radii and maximum area, touching each other are cut out from a rectangular cardboard of dimensions 14 cm ⨯ 7 cm. Find the area of the remaining cardboard.
In the given figure, ABCD is a square of side 4 cm. A quadrant of a circle of radius 1 cm is drawn at each vertex of the square and a circle of diameter 2 cm is also drawn. Find the area of the shaded region. [π = 3.14]
Find the area of a quadrant of a circle whose circumference is 44 cm.
The circumference of a circle is 39.6 cm. Find its area.
The side of a square is 10 cm. Find the area of the inscribed circle [π = 3.14]
Three equal circles, each of radius 6 cm, touch one another as shown in the figure. Find the area of enclosed between them.
The difference between the circumference and radius of a circle is 37 cm. The area of the circle is
In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. The length of the arc is
Find the circumference of the circle whose area is 25 times the area of the circle with radius 7 cm.
The circumference of a circle is equal to the perimeter of a square. The area of the square is 484 sq. m. Find the area of the circle.
Find the circumference of the circle whose area is 81π cm 2.
There are two circular gardens A and B. The circumference of garden A is 1.760 km and the area of garden B is 25 times the area of garden A. Find the circumference of garden B.
Complete the table below.
| Radius (r) | Diameter (d) | Circumference (c) |
| ...... | ...... | 616 cm |
The circumference o a garden roller is 280cm. How many revolutions does it make in moving 490m?
The diameters of front and rear wheels of a tractor are 80 cm and 2 m respectively. Find the number of revolutions that rear wheel will make in covering a distance in which the front wheel makes 1400 revolutions.
In reference to a circle the value of π is equal to ______.
ABCD is a given rectangle with length as 80 cm and breadth as 60 cm. P, Q, R, S are the midpoints of sides AB, BC, CD, DA respectively. A circular rangoli of radius 10 cm is drawn at the centre as shown in the following figure. Find the area of shaded portion.
