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Solids and liquids have higher mass densities (r) than gases. But the corresponding increase in both the modulus (B) of solids and liquids is much higher. The speed of the sound in Steel is 5941 (m s-1) The speed of the sound in Brass is 2,120 (m s-1) The speed of the sound in Helium is 965 (m s-1)
Speed of a boat in still water to speed of boat in upstream is 12: 7. If the boat can travel 425 km in downstream in 5 hours, then find the time taken b...
The ratio of the speed of boats ‘A’ and ‘B’ in still water is 8:9, respectively. The speed of the current is 25% of the speed of boat ‘A’ in...
A boat travels upstream at a speed of 10 km/h and downstream at 15 km/h. If the boat travels 30 km upstream and then returns, how much time does it take...
The speed of a boat in still water is 12 km/h and the speed of the current is 3 km/h. A person travels 270 kilometers in a boat in the upstream directio...
The speed of a boat in still water is 32km/hr and the speed of the current is 8km/hr. It takes a total of 15hours to row to upstream from Point A to B a...
The time taken by a boat to cover 72 km downstream is 3 hours less than the boat to cover a certain distance in upstream. The dow...
A man can row at 36 km/hr in still water. In a stream which is flowing at 12 km/hr, it takes him 3 hrs to a place and back. How far is the place?
A boat can travel 10 km more in downstream than that in upstream, in 5 hours while the difference between the time taken by the same boat to travel 250 ...
A man can row his boat with the stream at 14 km/h and against the stream in 8 km/hours. Find the rate of the stream.
The ratio between the time taken by a boat to cover a certain distance in upstream and the same distance in downstream is 5:1 respectively. The same boa...
