Advertisements
Advertisements
Question
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.
Advertisements
Solution
The Circumference of a Circle with diameter d is πd
The Circumference of a Circle with diameter 35cm is π x 35
= `(22)/(7) xx 35`
= 22 x 5
= 110cm
⇒ distance moved in 1 revolution = 110cm
= `(110)/(100)"m"`
= 1.1m
Total distance moved in 1 second = 1.1m
⇒ Total distance moved in 1 revolution = Total distance movedd in 1 second
⇒ Total distance moved in 2min = 2 x 60(Total distance moved in 1 revolution)
= 2 x 60 x .1m
APPEARS IN
RELATED QUESTIONS
In the figure given below, PQRS is square lawn with side PQ = 42 metres. Two circular flower beds are there on the sides PS and QR with centre at O, the intersections of its
diagonals. Find the total area of the two flower beds (shaded parts).
In the given figure,
\[\square\] PQRS is a rectangle. If PQ = 14 cm, QR = 21 cm, find the areas of the parts x, y, and z.
The side of a square is 10 cm. Find the area of the inscribed circle [π = 3.14]
The area of a circle inscribed in an equilateral triangle is 154 cm2. Find the perimeter of the triangle.
The perimeter of a circular field is 242 m. The area of the field is
Find the area and perimeter of the following sector :
Radius= 4.2 cm, angle at the centre is 60 °
Find the radius of the circle whose circumference is equal to the sum of the circumferences of the circles having radius 15 cm and 8 cm.
The center O of a circle of a radius 1.3 cm is at a distance of 3.8 cm from a given straight line AB. Draw a circle to touch the given straight line AB at a point P so that OP = 4.7 cm and to touch the given circle externally.
The circumference of a circle is numerically equal to its area. Find the area and circumference of the circle.
Find the circumference of the circles whose radii are given below.
91 mm
