Question
If the volume of a cylinder is 400π and the ratio of
radius to its height is 5:2 then find the curved surface area of cylinder?Solution
Volume of cylinder = 400π ⇒ πr2h = 400π ⇒ r2h = 400 units ⇒ 25x2*2x = 400 units ⇒ x3 = 8 ⇒ x = 2 Radius = 10 units & height = 4 units. Curved surface area = 2πrh Curved surface area = 80π unit ²
If the angle of a sector of a circle is 600 & its radius is 14 cm , find the length of arc of this sector?
In a circle AB is diameter & C is a point on circumference such that AC = 8 cm & BC = 15 cm then find the area of circle ?
In a circle of radius 10 cm, a chord AB has length 10√3 cm. Find:
(i) the distance of the chord from the centre, and
(ii) the measure of...
- A circle has its area eleven times greater than its circumference in numeric value. Find the circle’s diameter.
If the radius of a circle is 15 cm, then which of the following is true regarding the length of the chord (L)?
Find the area of largest square that can be inscribed in a circle of radius ‘r’.
- Find the area of a circle whose radius is (4/5)ᵗʰ of the side of a square whose area is 2,025 cm². (Use π = 3.14)
- The area of a rhombus is 1,600 cm², and the lengths of its diagonals are in the ratio 5:4. A circle is constructed with the smaller diagonal as the diamet...
A chord is 24 cm long and distance from center is 7 cm. Find radius.
From an external point P, two tangents PA and PB are drawn to a circle with centre O and radius 5 cm. The angle ∠APB is 60°. Find OP and PA.
