What is the total length, to the nearest foot, of a circular fence with radius 3.5 feet?

Find the rate of change of total surface are of a right circular cone w.r.t. radius . (Cone angle remain constant ), when radius=5 cm.

What is the magnetic induction at the centre of a circular coil of 10 turns, each of radius 5 cm and carrying a current of 5 A ?

What will be the cost of fencing a circular garden of radius 35 m at the rate of ₹16 per meter?(Take pi = (22)/(7) )

What is the area of a sector of a circle of radius 5 cm formed by an arc of length 3.5 cm?

Suppose a region is formed by removing a sector of 20^(@) from a circular region of radius 30 feet. What is the area of this new region?

A body of mass m is moving in a circular orbit of radius R about a planet of mass M. At some instant, it splits into two equal masses. The first mass moves in a circular orbit of radius R/2 . And the other mass, in a circular orbit of radius (3R)/(2) . The difference between the final and initial total energies is :

A wire of length 28 cm is bent to form a circular sector , then the radius (in cm) of the circular sector such that the area of the circular sector is maximum is equal to

Circular footpath of width 2 m is constructed at the rate of ₹ 20 per square meter, around a circular park of radius 1500 m. Find the total cost of construction of the foot path. (Take pi = 3.14 )