Home
Class 10
MATHS
A car has two wipers which do not ovarla...

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

Text Solution

Verified by Experts

The correct Answer is:
`1254.96cm^(2)`
Promotional Banner

Topper's Solved these Questions

  • TANGENTS AND SECANTS TO A CIRCLE

    NCERT GUJARATI|Exercise Optional exercise|6 Videos
  • TANGENTS AND SECANTS TO A CIRCLE

    NCERT GUJARATI|Exercise What we have discussed|4 Videos
  • TANGENTS AND SECANTS TO A CIRCLE

    NCERT GUJARATI|Exercise Exercise (9.2)|11 Videos
  • STATISTICS

    NCERT GUJARATI|Exercise THINK AND DISCUSS|8 Videos
  • TRIGONOMETRY

    NCERT GUJARATI|Exercise OPTIONAL EXERCISE|6 Videos

Similar Questions

Explore conceptually related problems

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 each sweep of the blades.

A rhombus has each side of length 20 cm and one pair of opposite angles 60^(@) each. Find the length of its diagonals.

Rasheed got a playing top (lattau) as his birthday present which surprisingly had no colour on it. He wanted to colour it with his cryons. The top is shaped like a cone surmounted by a hemisphere (see the given figure). 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) )

An open metal bucket is in the shape of a frustum of a conce. Mounted on a hollow cylinderical base made of the same metallic sheet (see the given figure) the diameters of the two circular ends of the bucket are 45 cm and 25 cn. The vertical height of the bucket is 40 cm and that of the cylinderical base is 6 cm. find the area of the metallic sheet used to make the bucket, hwere we do not tak einto account the handle of the bucket. also, find the volu8me of water the bucket can hold (Take pi=(22)/(7))

Hanumappa and his wif Gangamma are busy making jaggery out of sugarcane juice. They have processed the sugrcane juice to make the molasses, which is poured into moulds in the shape of a frustum of a cone having the diameters of its two circular faces as 30 cm and 35 cm and the vertical height of the mould is 14 cm (see the give figure). If each cm^(3) of molasses has mass about n 1.2g find the mass of the molasses that can be poured into each mould, (Take pi =(22)/(7))

Rachel, an engineering student, was asked to make a model shaped like a cylinder with two cones attached at its two ends by using a thin aluminium sheet. The diameter of the model is 3 cm and its length is 12 cm. If each cone has a height of 2 cm, find the volume of air contained in the model that Rachel made. (Assume the outer and inner dimensions of the model to be nearly the same.)

A solenoid 60 cm long and of radius 4.0 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 axis of the solenoid are in the horizontal plane. The wire is connected through two leads 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?

Two identical balls A and B each of mass 0.1 kg are attached to two identical mass less is springs. The spring-mass system is constrained to move inside a right smooth pipe bent in the form of a circle as shown in figure . The pipe is fixed in a horizontal plane. The center of the balls can move in a circle of radius 0.06 m . Each spring has a natural length of 0.06 pi m and force constant 0.1 N//m . Initially, both the balls are displaced by an angle theta = pi//6 radians with respect to diameter PQ of the circle and released from rest. a. Calculate the frequency of oscillation of the ball B. b. What is the total energy of the system ? c. Find the speed of the ball A when A and B are at the two ends of the diameter PQ.

A closed cubical box is made of perfectly insulating material and the only way for heat to enter or leave the box is through two solid cylindrical metal plugs, each of cross sectional area 12cm^(2) and length 8cm fixed in the opposite walls of the box. The outer surface of one plug is kept at a temperature of 100^(@)C . while the outer surface of the plug is maintained at a temperature of 4(@)C . The thermal conductivity of the material of the plug is 2.0Wm^(-1).^(@)C^(-1) . A source of energy generating 13W is enclosed inside the box. Find the equilibrium temperature of the inner surface of the box assuming that it is the same at all points on the inner surface.