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Therm is a non-SI unit of heat energy equal to 100,000 British thermal units (BTU). It is approximately the energy equivalent of burning 100 cubic feet (often referred to as 1 CCF) of natural gas. Since (Natural Gas) meters measure volume and not energy content, a therm factor is used by (Natural) gas companies to convert the volume of gas used to its heat equivalent, and thus calculate the actual energy use.
Two pipes A and B can fill a tank in 15 hours and 20 hours, respectively. If both pipes are opened together and then pipe A is closed after 5 hours, how...
A deck of 52 cards is used. Two king cards and one spade are removed from the deck. Then, two cards are drawn randomly one after the other without repla...
An investor deposits ₹50,000 in a bank that offers a simple interest rate of 8% per annum. How much interest will the investor earn after 3 years, and...
A vessel is completely filled with milk. If 48% of the milk is replaced with water then only 130 ml of milk will be left in the vessel. What is the tota...
3, 14, 69, 340, 1825, ?.
Find the greatest 3-digit number which when divided by 11 or 14 leaves a remainder of 3.
I). p2 + 16p + 55 = 0
II). q2 + 9q + 20 = 0
55-litres of paint is added to a mixture of paint and oil in the ratio 3:5. The ratio of paint and oil in the resulting mixture is 4:3. Find the total v...
A mixture contains 40 liters of milk and 10 liters of water. How much milk should be added to make the ratio of milk to water 5:1?