Area Problems The ratio of the area of a square to that of the square drawn on its diagonal is 4:1 3:1 2;3 1:2 4:1 3:1 2;3 1:2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP atio = a 2 2 a 2
Area Problems One side of a rectangular field is 4 meter and its diagonal is 5 meter. The area of the field is? 15 m2 20 m 2 4?5 m2 12 m2 15 m2 20 m 2 4?5 m2 12 m2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Other side = ?5 2 - 42 = ? 9=3 mSo The area of the rectangular field = 4 x 3 = 12 m2
Area Problems The perimeter of two square is 12 cm and 24 cm. The area of the bigger square is how many times that of the smaller? 3 times 5 times 4 times 2 times 3 times 5 times 4 times 2 times ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Ratio of area of 2 squares = (ratio of perimeter of 2 squares)2= (24/12)2= 4
Area Problems If the radius of a circle is decreased by 50% , find the percentage decrease in its area. 35% 25% 75% 65% 35% 25% 75% 65% ANSWER EXPLANATION DOWNLOAD EXAMIANS APP let original radius = r and new radius = (50/100) r = r/2 original area = ?r 2 and new area = ? r / 2 2 decrease in area = 3 ?r 2 / 4 * 1 ?r 2 *100 = 75%
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 diameter of a circle is 105 cm less than the circumference. What is the diameter of the circle? 49 cm 44 cm 48 cm 46 cm 49 cm 44 cm 48 cm 46 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
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