Mathematics
A bucket is raised from a well by means of a rope which is wound round a wheel of diameter 77 cm. Given that the bucket ascends in 1 minute 28 seconds with a uniform speed of 1.1 m/sec, calculate the number of complete revolutions the wheel makes in raising the bucket.
Related Questions
The circumference of a circle is 123.2 cm. Calculate :
(i) the radius of the circle in cm.
(ii) the area of the circle in cm2, correct to nearest cm2.
(iii) the effect on the area of the circle if the radius is doubled.
The wheel of a cart is making 5 revolutions per second. If the diameter of the wheel is 84 cm, find its speed in km/hr. Give your answer, correct to the nearest km.
In the figure (i) given below, AC and BD are two perpendicular diameters of a circle ABCD. Given that the area of shaded portion is 308 cm2, calculate :
(i) the length of AC and
(ii) the circumference of the circle.
In the figure (ii) given below, AC and BD are two perpendicular diameters of a circle with center O. If AC = 16 cm, calculate the area and perimeter of the shaded part. (Take π = 3.14)
