Question
A pipe fills a tank in 20 hours, and another pipe
empties it in 30 hours. If both pipes are opened together, how long will it take to fill the tank?Solution
The rate of the filling pipe is 1/20. The rate of the emptying pipe is 1/30. Net rate = (1/20 - 1/30) = 1/60. Time taken = 60 hours. Correct Option: d) 60 hours
Person A can finish a task alone in 22(3/5) days, while Person B can complete the same task alone in 14(1/8) days. If A and B collaborate on the task, h...
What is the area of an equilateral triangle with a side length of 8 cm?
Solve the equation:sin(x) + cos(x) = 2·sin(x + α). Then the value of α is:
A merchant mixes two varieties of rice, one costing ₹55 per kg and the other costing ₹80 per kg, and sells the mixture at ₹75 per kg, making a pro...
Pipe P can fill a tank by itself in 16 hours, while pipe R can empty the tank in 36 hours when it is full. Together, pipes P and ...
31.5 ÷ 1.75 × 6 – 12 = ? + 34
Which is not the function of the Operating System?
In Microsoft Excel, what does the function VLOOKUP do?
A manufacturer sells an article to a wholesaler at a profit of 20%. The wholesaler sells it to a retailer at a profit of 25%, and the retailer sells it ...
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