Area Problems If the sides of a rectangle are increased by 5%, find the percentage increase in its diagonals. 6% 5% 4% 9% 6% 5% 4% 9% ANSWER EXPLANATION DOWNLOAD EXAMIANS APP According to the formula,Percentage increase in diagonals = 5%
Area Problems If a regular hexagon is inscribed in a circle of radius, r then its perimeter? 6r 9r 3r 12r 6r 9r 3r 12r ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Length of each side of hexagoan = radius of circle ? its perimeter = 6r
Area Problems The circumferences of two concentric are 176 m and 132 m respectively. what is the difference between their radii? 5 meter 44 meter 8 meter 7 meter 5 meter 44 meter 8 meter 7 meter ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? 2?R - 2?r = (176-132)? 2?(R-r) = 44? R-r = ( 44 x 7 )/ (2 x 22)= 7 m
Area Problems The perimeter of an equilateral triangle is 90 cm. Find its area. 225?3 sq cm 250?3 sq cm 135?3 sq cm 151?3 sq cm 225?3 sq cm 250?3 sq cm 135?3 sq cm 151?3 sq cm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given that, perimeter = 90 cm? 3a = 90 cm [a = side]? a = 90/3 = 30 cm? Area = ?3a2 / 4 = ?3/4 x (30)2= 900 x ?3/4 = 225?3 sq cm
Area Problems The radius of a circular field is 25 m. Find the area of the field. 135 ? sq m 625 ? sq m 125 ? sq m 25 ? sq m 135 ? sq m 625 ? sq m 125 ? sq m 25 ? sq m ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Required area = ?r2 = ? x 25 x 25 = 625? sq m.
Area Problems The base of right-angled triangle is 5 meters and hypotenuse is 13 meters . Its area will be? None of these 30m2 28 m2 25m2 None of these 30m2 28 m2 25m2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Altitude = ?(13)2 - (5)2= ?144 = 12m ? Area of the triangle = (5 x 12 ) / 2 m2= 30m2
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