Advertisements
Advertisements
प्रश्न
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
उत्तर
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
संबंधित प्रश्न
A car has wheels which are 80 cm in diameter. How many complete revolutions does each wheel make in 10 minutes when the car is travelling at a speed of 66 km per hour ?
Find the circumference of the inner and the outer circles, shown in the adjoining figure? (Take π = 3.14)
The minute hand of a clock is √21 𝑐𝑚 long. Find area described by the minute hand on the face of clock between 7 am and 7:05 am
A path of 8 m width runs around the outsider of a circular park whose radius is 17 m. Find the area of the path.
Three equal circles, each of radius 6 cm, touch one another as shown in the figure. Find the area of enclosed between them.
The radii of two concentric circles are 19 cm and 16 cm respectively. The area of the ring enclosed by these circles is
Draw the circumcircle of Δ PMT in which PM = 5.4, P = 60°, M = 70°.
Find the circumference of the circle whose area is 25times the area of the circle with radius 7cm.
Areas of two circles are equal. Is it necessary that their circumferences are equal? Why?
The area of a circular playground is 22176 m2. Find the cost of fencing this ground at the rate of Rs 50 per metre.
