Area Problems The area of an equilateral triangle whose side is 8 cms is? 64 cm2 4?3 cm2 16?3 cm2 21.3 cm2 64 cm2 4?3 cm2 16?3 cm2 21.3 cm2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Req. Area = ?3/4 x a2 = ?3/4 x 82 cm2= 16?3 cm2
Area Problems The area of the largest circle that can be drawn inside a rectangle with sides 18cm by 14cm is 378 1078 49 154 378 1078 49 154 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The diameter is equal to the shortest side of the rectangle. So radius= 14/2 = 7cm. Therefore, area of circle = (r)2 = (22/7) x 49 = 154 cm2
Area Problems If the ratio of the area of two square is 9 : 1 the ratio of their perimeters is? 3:4 3:1 1:3 9:1 3:4 3:1 1:3 9:1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the area of square be (9x)2 m2 and (x2) m2Then, their sides are (3x) m and x metres respectively? Ratio of their perimeters = 12x / 4x=3:1
Area Problems One side of a parallelogram is 8.06 cm and its perpendicular distance from opposite side is 2.08 cm. What is the approximate area of the parallelogram? 22.56 cm2 12.56 cm2 14.56 cm2 16.76 cm2 22.56 cm2 12.56 cm2 14.56 cm2 16.76 cm2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Area of parallelogram = Base x Height = 8.06 x 2.08 = 16.76 cm2
Area Problems The lengths of three line segments (in cm) are given in each of the four cases. Which one of the following cases is not suitable to be the three sides of a triangle? 3, 4, 5 2, 4, 5 2, 3, 5 2, 3, 4 3, 4, 5 2, 4, 5 2, 3, 5 2, 3, 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP We know that in any triangle "the sum of two sides is always greater than its third side" and "the difference of two sides is always less than its third side".(i) 2 + 3 is not greater than 5 (ii) |5 - 2| not less than 3
Area Problems If the circumference of a circle is the 352 meters, then its area in m square is? 9856 6589 5986 8956 9856 6589 5986 8956 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP circumference = 2?r = 2 x (22 / 7) x r = 352? r = (352 x 7) / (22 x 2) =56 cmNow area = ?r2 = (22 / 7) x 56 x 56 m2= 9856 m2
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