 Hello and welcome to the session. I am Deepika here. Let's discuss a question. It says a car has two helpers, which do not overlap. Each Piper has a blade of length 25 centimeter, sweeping through an angle of 115 degree. Find the total area clean at each sweep of the blades. Now the above question will be solved by using the formula for finding the area of a sector of a circle. These are radius in degrees. So this is a key idea behind our question. Start the solution. Now in the question it is given that each Piper has a blade of length 25 centimeter. So that is the radius of the circle equal to 25 centimeter. Now it is also given that blade is sweeping through an angle of 115 degree that is theta is equal to 115 degree. Now area cleaned sweep of the blade is equal to area of the sector with radius 25 centimeter and angle of at the center 115 degree. And according to our key idea this is equal to theta upon 360 into pi r square. So this is equal to 115 upon 360 into take pi is 22 by 7 into 25 into 25 centimeter square. Now here in the question it is given that there are two wipers and they do not overlap. Then the total area clean at each sweep of the blades equal to 2 into 115 upon 360 into 22 by 7 into 25 into 25 centimeter square because the two wipers do not overlap. So on cancellation we have this is equal to so this is equal to 115 into 11 into 5 into 25 upon 18 into 7 centimeter square or this is equal to 158125 upon 126 centimeter square. Hence the answer for the above question is 158125 upon 126 centimeter square. This is a total area cleaned at each sweep of the blades. I hope the solution is clear to you. Bye and take care.