Advertisements
Advertisements
प्रश्न
The radius of the wheel of a vehicle is 42 cm. How many revolutions will it complete in a 19.8-km-long journey?
उत्तर
Radius of the wheel = 42 cm
Circumference of the wheel = 2πr
`= 2 xx 22/7xx420`
= 264 cm
`=264/100 "m" `
= 2.64 m
Distance covered by the wheel in 1 revolution = 2.64 m
Total distance = 19.8 km or 19800 m
∴ Number of revolutions taken by the wheel `=19800/2.64 = 7500`
APPEARS IN
संबंधित प्रश्न
A car travels 1 km distance in which each wheel makes 450 complete revolutions. Find the radius of wheel.
Find the angle subtended at the centre of circle of radius 5cm by an arc of length `((5pi)/3)` cm
Choose the correct alternative answer for the following question.
The circumference of a circle is 22 cm. Find the area of its quadrant.
The circumferences of two circles are in the ratio 2: 3. What is the ratio between their areas?
If the sum of the circumferences of two circles with radii R1 and R2 is equal to the circumference of a circle of radius R, then ______.
The area of the circle is given below; find the diameter.
176 sq cm
A lawn is in the shape of a semi-circle of diameter 42 m. The lawn is surrounded by a flower bed of width 7 m all around. Find the area of the flower bed in m2 .
Find the area and perimeter of the following semicircles: Diameter = 7cm
The diameter of the bullock cart wheel is 1.4 m. Find the distance covered by it in 150 rotations?
