Question
The perimeter of a sector of a circle, whose radius is
15 cm, is 61 cm. If the length of a rectangle is 10 cm more than the arc subtended by the sector and its perimeter is 90 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) = 61 Or, l = 61 – 2r = 61 – (2 × 15) = 31 cm Therefore, length of the rectangle = 31 + 10 = 41 cm Let the breadth of the rectangle be ‘b’ cm Therefore, 2 × (41 + b) = 90 Or, b = 45 – 41 = 4 cm Therefore, area of the rectangle = length × breadth = 4 × 41 = 164 cm2
According to Mass Flow Hypothesis the sugar is moved in the form of ____into the companion cells and then into the living phloem sieve tube cells by...
Which of the following statements is/are true?
Statement A: Soil testing provides valuable information about nutrient levels, pH, and other soil ...
Mating of Goat is-
A non selective translocated herbicide is
Among the following insect orders, which is exclusively herbivorous in nature?
What is the core purpose of the principle of leadership in extension education?
The proportion of area under different crops at a point of time in a region is called:
Chlorine is associated to photosynthesis in production of:
Standardisation relates to ........................................ ?
Boron deficiency causes:
