Question
Pipe ‘A’ can fill a tank in 6 hours whereas pipe
‘B’ can empty it in 18 hours. If both pipes are opened together while pipe ‘B’ is closed after 2 hours, then find the time taken by pipe ‘A’ to fill the rest of the tank.Solution
ATQ; Let the capacity of the tank be 18 litres. {LCM (6 and 18)} Efficiency of inlet pipe ‘A’ = (18/6) = 3 litres/hour Efficiency of outlet pipe ‘B’ = (18/18) = 1 litre/hour Combined efficiency of both pipes = (3 – 1) = 2 litres/hour Required time = {18 – (2 × 2)} ÷ 3 = 5 hours
(31.9)3 + (34.021)² - (16.11)3 - (42.98)² = ?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
What approximate value should come in the place of question mark in the following questions?
(598.5 ÷ 29.9) + (401.2 ÷ 20.1) = ?
(16.16 × 34.98) + 14.15% of 549.99 = ? + 124.34
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
960.02 of 238.89 ÷ 144.01 of 79.97 = ?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
320.98 + 49.99% of (261.09 + 138.98) = ?
? = 29.91% of 49.94% of ((56.25 × 4.09 + 23.01 × 7.89) × 99.98)
20.02% of (95.96 × 104.01 – 56.02 × 64.04) – ? = 12.02 × 39.96 + 103.03
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