A car has two wipers which do not overlap. Each wiper has a blade of length 25 cm sweeping through an angle of `115^(@)` . Find the total area cleaned at the sweep of the blades . (use `pi=(22)/(7)`)

The length of the minute hand of a clock is 3.5 cm Find the area swept by minute hand in 30 minutes . ("use"pi=(22)/(7))

Find the radius of the circle in which a central angle of 60^(@) intercepts and arc of length 37.4cm use pi = (22)/(7).

In a circle of radius 12 cm, a chord subtends an angle of 120^@ at the centre. Find the area of the corresponding minor segment of the circle.(Use pi=22/7 and sqrt3=1.732 )

AB and CD are respectively arcs of two concentric circles of radii 21 cm and 7 cm . With centre O (See figure ). If angleAOB=30^(@) ,find the area of the shaded region . (use pi=(22)/(7) )

Koushik got a playing top as his birthday present, which surprisingly had no colour on it. He wanted to colour it with his crayons. The top is shaped like a cone surmounted by a hemisphere. The entire top is 5 cm. in height and the diameter of the top is 3.5 cm. Find the area he has to colour. (Take pi=22/7 )

A solenoid 60 cm long and of radius 7.0 cm has 3 layers of windings of 300 turns each. A 2.0 cm long wire of mass 2.5 g lies inside the solenoid (near its centre) normal to its axis, both the wire and the ais of the solenoid are in the hoorizontal plane. The wire is connected through two lead parallel to the axis of the solenoid to an external battery which supplies a current of 6.0 A in the wire. What value of current (with appropriate sense of circulation) in the windings of the solenoid can support the weight of the wire ? g=9.8 m s^(-2) .

Find the degree measure of the angle subtended at the centre of a circle of radius 100 cm by an arc of length 22 cm (Use pi = (22)/(7) ).

A B and CD are respectively arcs of two concentric circles of radii 21 CM and 7cm which center O(see figure).If /_=30^@ find the area of the shaded region. ( use pi=22/7 )