Question
The perimeter of a sector of a circle, whose radius is
22 cm, is 64 cm. If the length of a rectangle is 10 cm more than the arc subtended by the sector and its perimeter is 80 cm, then find the area (in cm2) of the rectangle.Solution
Let the arc subtended by the sector be ‘l’ cm and the radius of the circle be ‘r’ cm According to the question, (l + 2r) = 64 Or, l = 64 – 2r = 64 – (2 × 22) = 20 cm Therefore, length of the rectangle = 20 + 10 = 30 cm Let the breadth of the rectangle be ‘b’ cm Therefore, 2 × (30 + b) = 80 Or, b = 40 – 30 = 10 cm Therefore, area of the rectangle = length × breadth = 10 × 30 = 300 cm2
Which of the following methods refers to deactivation of microbes in food using electricity?
dense webbing of rice grain in storage results due to
Globally India has been ranked ____ in terms of Oilseeds production
Which of the following agroforestry system is a combination of Agri-silviculture and Silvi- pasture where the land is managed for the concurrent product...
High soil temperature suppresses the weed germination. The heating process is
What is the commonly used conversion factor to convert organic carbon to organic matter,
The copper deficiency in wheat under rice-wheat system in sandy soils can be corrected by
The costs that have already been incurred and cannot be recovered are called ____
Which scattering phenomenon is responsible for the primary cause of the blue color of the sky?
Which of the following fruit is mostly formed through natural parthenocarpy
Relevant for Exams:
