Area Problems The area of the sector of a circle, whose radius is 12 meters and whose angle at the centre is 42, is? 39.6 sq. meters 52.8 sq. meters 79.2 sq. meters 26.4 sq. meters 39.6 sq. meters 52.8 sq. meters 79.2 sq. meters 26.4 sq. meters ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Area of the sector = [(22/7) x 12 x 12] x [42°/360°] m2 = 52.8 m2
Area Problems If a regular hexagon is inscribed in a circle of radius, r then its perimeter? 3r 6r 9r 12r 3r 6r 9r 12r ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Length of each side of hexagoan = radius of circle ? its perimeter = 6r
Area Problems If the length of diagonal AC of a square ABCD is 5.2 cm then area of the square ABCD is? 10 sq.cm 15.12 sq.cm 13.52 sq.cm 12.62 sq.cm 10 sq.cm 15.12 sq.cm 13.52 sq.cm 12.62 sq.cm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Area = 1/2 x (Diagonal)2= (1/2) x 5.2 x 5.2 cm2= 13.52 cm2
Area Problems The breadth of a rectangle is 25 m. The total cost of putting a grass bed on this field was ? 12375, at the rate of ? 15 per sq m. What is the length of the rectangular field? 32 m 27 m 33 m 30 m 32 m 27 m 33 m 30 m ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Area to the rectangular field = 12375/15 = 825 sq mAccording to the question, (L x B) = 825 [L = length and B = breadth]? L x 25 = 825 ? L = 825/25 = 33 m
Area Problems The ratio of the radii of two circle is 1:3 the radio of their areas is? 1:6 1:9 None of these 1:3 1:6 1:9 None of these 1:3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The Radio of areas = area of first circle : area of 2nd circle= ?r2 / ?(3r)2= ?r2/ 9 ?r2= 1/9 = 1: 9
Area Problems The diameter of a circle is 105 cm less than the circumference. What is the diameter of the circle? 44 cm 46 cm 49 cm 48 cm 44 cm 46 cm 49 cm 48 cm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? ?d-d = 105 cm ? (? -1 ) d = 105 cm? [(22/7)-1] x d = 105 cm? d = (7/15) x 105 cm = 49 cm
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