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Upstream speed = 259/7 = 37 km/h Downstream speed = 477/9 = 53 km/h Speed of boat in still water = (37 + 53)/2 = 45 km/h Speed of stream = (53 – 37)/2 = 8 km/h Increased speed of boat in still water = 45 + 4 = 49 km/h Decreased speed of stream = 8 – 2 = 6 km/h Required time taken = 602/(49 – 6) + 605/(49 + 6) = 14 + 11 = 25 hours
What does 'A' in ANSI stand for ____________.
A trader bought a bicycle for ₹12,000 and sold it at a profit of 25%. After a month, he offered a discount of 10% on the selling price to attract more...
Pipe X can fill a tank on its own in 12 hours, while Pipe Y can fill the same tank individually in 20 hours. Both pipes X and Y o...
A collection of related files is called a______.
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...
6, 8, 15, 44, ?, 1134.
How many words are formed from the letters of the word CHAMPION when vowels (A, I, O) always are together?
Which of the following functions is not one-one?
If sets A and B contain 4 and 5 elements respectively, then the total number of binary relations from A to B is:
28, 52, 84, 124, 172, ?.