Advertisements
Advertisements
प्रश्न
The diameter of a cycle wheel is `4(5)/(11)"cm"`. How many revolutions will it make in moving 6.3km?
Advertisements
उत्तर
The Circumference of a wheel with diameter d is πd
The Circumference of a wheel with diameter `4(5)/(11)"cm"`
= `(49)/(11) "is" pi xx (49)/(11)`
= `(22)/(7) xx (49)/(11)`
= 14cm
Total distance moved
= 6.3km
= 6.3 x 100000cm
= 630000cm
Number of revolutions
= `"Total distance moved"/"Circumference of wheel"`
= `(6.3 xx 100000)/(14)`
= 45000.
APPEARS IN
संबंधित प्रश्न
In Figure, find the area of the shaded region [Use π = 3.14]
The minute hand of a clock is 10cm long. Find the area of the face of the clock described by the minute hand between 9 A.M. and 9.35 A.M.
A car travels 1 km distance in which each wheel makes 450 complete revolutions. Find the radius of wheel.
In circle of radius 6cm, chord of length 10 cm makes an angle of 110° at the centre of circle find Length of arc
The area of a circle is 38.5 cm2. The circumference of the circle is
The sum of diameter of two circles is 112 cm and the sum of their areas is 5236 cm2 Find the radii of the two circles.
The sum of the radii of two circles is 10.5 cm and the difference of their circumferences is 13. 2 cm. Find the radii of the two circles.
A cart wheel makes 9 revolutions per second. If the diameter of the wheel is 42cm, find its speed in km per hour. (Answer correct to the nearest km)
The area between the circumference of two concentric circles is 2464cm2. If the inner circle has a circumference of 132cm, calculate the radius of the outer 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?
