Area Problems What is the diameter of the circle having 3 cm radius? 12 cm 6 cm 8 cm 1.5 cm 12 cm 6 cm 8 cm 1.5 cm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Radius = Diameter/2 ? Diameter = 2 x Radius = 2 x 3 = 6 cm
Area Problems If a regular hexagon is inscribed in a circle of radius, r then its perimeter? 3r 9r 6r 12r 3r 9r 6r 12r ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Length of each side of hexagoan = radius of circle ? its perimeter = 6r
Area Problems The ratio of the area of square of side a and equilateral triangle of side a is? 2 : ?3 4 :3 2 :1 4 : ?3 2 : ?3 4 :3 2 :1 4 : ?3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Ratio of area = a2/ ?(3/4) a2= 4/?3 = 4:?3
Area Problems A triangle with three equal sides has its area equal to 3?3 sq cm . Find its perimeter . 2?3 cm 5?3 cm 6?3 cm 7?3 cm 2?3 cm 5?3 cm 6?3 cm 7?3 cm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP According to the question,?3a2/4 = 3?3 [ side = a, and area = ?3a2/4] ? a2/4 = 3 ? a2 = 3 x 4 ? a = 2?3? Required perimeter = 3a =3 x 2?3 = 6?3 cm
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
Area Problems The ratio of the corresponding sides of two similar triangles is 3 : 4, The ratio of their areas is? 9 : 16 4 : 3 ? 3: 2 3 : 4 9 : 16 4 : 3 ? 3: 2 3 : 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Ratio of similar triangle = Ratio of the square of corresponding sides = (3x)2 / (4x)2 = 9x2 / 16x2 = 9/16 = 9 : 16
EXAMIANS