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Let the ages of 'A' and 'B', 15 years ago from now was, '3x' years and 'x' years, respectively. ATQ; {(3x + 10)/(x + 10)} = (31/17) Or, 17 × (3x + 10) = 31 × (x + 10) Or, 51x + 170 = 31x + 310 Or, 20x = 140 So, x = 7 So, present age of 'A' = 3 × 7 + 15 = 36 years And present age of 'B' = 7 + 15 = 22 years So, required percentage = {(36 - 22)/22} × 100 = 63.63%
15.001% of 799.99 - 3/11% of 1099.99 + 111.002 = ?
239.977 ÷ 5.998 + √840.913 × 6.113 = ? + 117.948
256.12 ÷ 7.92 + 26.11 × 7.82 – 44.09 = ?2
16.11 × 9.96 – (238.19 – 64.04 × 2.18) = ?
? + 163.99 – 103.01 = 24.01 × 6.98
(405.91 ÷ 14.32 + 1979.83 ÷ 54.98 + 194.68) × 111.76 ÷ 51.94 = ?
4821.49 - 3123.87 + 5643.92 + ? = 11500.68
A motor boat goes downstream from point A to B ,which is 36 km away from point A, and then returns to A. If actual speed of the boat in still water is 7...
? + 96.18 – 15.02 = 118.98 + 31.09
(7008.79)2/7009.201 × √1442.76 × 0.4897 =?