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Let the total capacity of tank be 40 units Efficiency of pipe ‘A’ = 40/20 = 2 units/hour Efficiency of pipe ‘B’ = 40/40 = 1 units/hour Tank filled in 2 hours = (2 – 1) = 1 units Therefore, tank filled in (2 × 14 = 28 hours) = 1 × 14 = 14 units Required percentage of tank filled = (14/40) × 100 = 35%
Find the value of (x + y)² - (x - y)², where x = 15 and y = 7.
1672 ÷ 19 = ?% of 220
(30% of 400 - 20% of 540 + 35% of 1000) = ?
{(3/8) + (5/6)} × 120 – 53 = ?
(47.5 ÷ 9.5) × (78.5 ÷ 15.7) + 475 = ? + 15% of 150
√( (664+ √(136+ √(59+ √(21+ √(7+ √81) ) ) ) ) ) = ?
Simplify:
√4761 ÷ 23 + √12769 = ? × 58
5/12 of 216 + 3/4 of 120 – 2/5 of 140 = ?
? = (√784 - √361) + 102 - 3√512