Advertisements
Advertisements
Question
A wheel of a car covers a distance of 3520 cm in 20 rotations. Find the radius of the wheel?
Advertisements
Solution
Distance covered by circular wheel in 20 rotation = 3520 cm
∴ Distance covered in rotation = `3520/20 "cm"` = 176 cm
∴ Circumference of the wheel = 176 cm
∴ 2πr = 176
`2 xx (-2)/6 xx "r"` = 176
r = `(176 xx 7)/(2 xx 22)`
r = 28 cm
Radius of the wheel = 28 cm
APPEARS IN
RELATED QUESTIONS
A gardener wants to fence a circular garden of diameter 21 m. Find the length of the rope he needs to purchase, if he makes 2 rounds of fence. Also find the costs of the rope, if it cost ₹ 4 per meter. (Take `pi = 22/7`)
The circumference of two circles are in ratio 2:3. Find the ratio of their areas
Find the angle subtended at the centre of circle of radius ‘a’ cm by an arc of length
`(api)/4` 𝑐𝑚
The wheel of a motorcycle is of radius 35 cm. How many revolutions per minute must the wheel make so as to keep a speed of 66 km/hr ?
The circumference of a circle exceeds its diameter by 45 cm. Find the circumference of the circle.
In the given figure, OPQR is a rhombus, three of whose vertices lie on a circle with centre O. If the area of the rhombus is `32sqrt(3)` cm2, find the radius of the circle.
The areas of two circles are in the ratio 9 : 4. The ratio of their circumferences is ______.
A wire is in the form of a circle of radius 42 cm. It is bent into a square.
Determine the side of the square and compare the area of the regions enclosed in two cases.
The circumference of a circle is 440 cm. Find its radius and diameter. (Take π = `22/7`)
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.
