Area Problems Find the length of a rope by which a cow must be tethered in order that it may be able to graze an area of 154 sq m. 7 m 12 m 8 m 13 m 7 m 12 m 8 m 13 m ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Length of to the rope = Radius of circle According to the question,?r2 = 154 ? r2 = 154 x (7/22) = 7 x 7 = 49 ? r = ?49 = 7 m
Area Problems The ratios of areas of two squares, one having its diagonal double than the other is 2:1 4:1 3:1 2:3 2:1 4:1 3:1 2:3 ANSWER DOWNLOAD EXAMIANS APP
Area Problems Find the area of a rectangle having 15m length and 8m breadth. 125 sq m 115 sq m 120 sq m 111 sq m 125 sq m 115 sq m 120 sq m 111 sq m ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Required area = Length x Breadth= 15 x 8 = 120 sq m
Area Problems The area of circle is 38.5 sq. cm. Its circumference is? 11 cm 6.20 cm 22 cm 121 cm 11 cm 6.20 cm 22 cm 121 cm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? ( 22 x r2) / 7 = 38.5? r2 =(38.5 x 7) /22? r = 3.5 cm? Circumference = 2 x (22/7) x 3.5 cm= 22 cm
Area Problems The area of the sector of a circle, whose radius is 12 meters and whose angle at the centre is 42, is? 79.2 sq. meters 39.6 sq. meters 26.4 sq. meters 52.8 sq. meters 79.2 sq. meters 39.6 sq. meters 26.4 sq. meters 52.8 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 A wheel makes 1000 revolutions in covering a distance of 88 km. the diameter of the wheel is? 28 meters 14 meters 24 meters 40 meters 28 meters 14 meters 24 meters 40 meters ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Distance covered in one revolution = total distance travelled / total number of revolution. = ( 88 x 1000) / 1000 m = 88 mWe know that the distance covered in one revolution = circumference of the wheel.? ?d = 88? 22d / 7 = 88? d = 28 m
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