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Quantity I: a2 + lb = 546 142 + 25b = 546 196 + 25b = 546 25b = 546 – 196 25b = 350, b = 14 cm Perimeter of square = 4a = 4 `xx` 14 = 56 cm Perimeter of rectangle = 2 x (l + b) = 2 x (25 + 14) = 78 cm Required sum = 56 + 78 = 134 cm Quantity II: The area of the equilateral triangle = 441√3 Sq cm The area of the equilateral triangle = (√3/4) `xx` a2 a2 = 441 `xx` 4 Side (a) = 21 `xx` 2 = 42 cm The diameter of the circle = 42 cm Radius (r) = 21 cm Circumference of the circle = 2πr = 2 x (22/7) x 21 = 132 cm
120, 125, 140, 165, 210, 245
2, 4, 16, 48, 240, 1440, 10080
5, 13, 41, 185, 1111, 8149
Find the wrong number in given number series.
2556, 2613, 2734, 2841, 3012, 3221
-2, 0, 8, 32, 64, 66
171, 86, 87, 132, 266, 668
1, 18, 44, 81, 131, 198
123, 155, 198, 246, 301, 363