Area Problems The circumferences of two concentric are 176 m and 132 m respectively. what is the difference between their radii? 7 meter 44 meter 5 meter 8 meter 7 meter 44 meter 5 meter 8 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 A man walked diagonally across a square plot. Approximately what was the percent saved by not walking along the edges? 20% 40% 10% 30% 20% 40% 10% 30% ANSWER EXPLANATION DOWNLOAD EXAMIANS APP let the side of the square be x meterslength of two sides = 2x metersdiagonal = 2 x = 1.414x m saving on 2x meters = .59x m saving % = 0 . 59 x 2 x * 100 % = 30% (approx)
Area Problems The perimeter of an isosceles triangle is 26 cm while equal sides together measure 20 cm. The third side and each of the equal sides are respectively. 8 cm and 9 cm 6 cm and 10 cm 10 cm and 8 cm 14 cm and 6 cm 8 cm and 9 cm 6 cm and 10 cm 10 cm and 8 cm 14 cm and 6 cm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the third side be x.According to the question,x + 20 = 26? x = 26 - 20 = 6 cm ? Each equal side = 20/2 = 10 cm
Area Problems Four horses are be tethered at four concern of a square plot of side 63 meters, so that they just cannot reach one another. The area left ungrazed is? 675.5 m2 785.8 m2 780.6 m2 850.5 m2 675.5 m2 785.8 m2 780.6 m2 850.5 m2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Area left ungrazed = [(63 x 63) - (4 x 1/4 x 22/7 x (63/2)2] m2= (63 x 63 - (99 x 63)/2 ) m2= 63 x (63 - 99/2) m2= 850.5 m2
Area Problems The length of each side of an equilateral triangle having an area of 4?3 cm 2 is? 4 cm 3 cm 4/?3 cm ?3/4 cm 4 cm 3 cm 4/?3 cm ?3/4 cm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Area of equilateral triangle = ?3/4 a2 = 4?3.? a2 = 16? a = 4 cm
Area Problems The length and breadth of a playground are 36 m and 21 m respectively. Flagstaffs are required to be fixed on all along the boundary at a distance of 3 m apart. The number of flagstaffs will be? 39 37 40 38 39 37 40 38 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Perimeter = 2 x (36 + 21 ) m = 144 m ? Number of flagstaffs = 144 / 3 = 38
EXAMIANS