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
Given figure depicts an archery target marked with its five scoring areas from the centre outwards as Gold, Red, Blue, Black and White. The diameter of the region representing Gold score is 21 cm and each of the other bands is 10.5 cm wide. Find the area of each of the five scoring regions. [use π = 22/7]
Find the perimeter of a semicircular protractor whose diameter is 14 cm.
Three equal circles, each of radius 6 cm, touch one another as shown in the figure. Find the area of enclosed between them.
The circumference of a circle is 22 cm. Find its area.
The radius of two circles are in the ratio 3 : 5, find the ratio between their circumferences.
If the circumference of a circle is 176 cm, find its radius.
A bucket is raised from a well by means of a rope wound round a wheel of diameter 35 cm. If the bucket ascends in 2 minutes with a uniform speed of 1.1 m per sec, calculate the number of complete revolutions the wheel makes in raising the bucket.
Find the perimeter of the given shape (Take π = `22/7`).
Formula used to find the circumference of a circle is
Find the area of the shaded region given in figure
