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In 1900, at the age of 21, Albert Einstein was a university graduate and unemployed. To manage his expenses, he worked as a teaching assistant and gave private lessons. He finally secured a job in 1902 as a technical expert in the patent office in Bern. While he was supposed to be assessing other people’s inventions, Einstein was actually developing his own ideas in secret. He is said to have jokingly called his desk drawer at work the “bureau of theoretical physics.” One of the famous papers of 1905 was Einstein’s Special Theory of Relativity, according to which time and distance are not absolute.
A boat moves 25km upstream and 39km downstream in 8 hours. It travels 35km upstream and 52km downstream in 11 hours. What is the speed of the stream if ...
Speed of a boat in still water is 10 kmph and speed of stream is 6 kmph. A man rows to a place at a distance of 32 km and come back to starting point. T...
Speed of a boat in still water is 3 times more than the speed of stream. If boat covers 135 km in downstream in 9 hours, then find the time taken by the...
Speed of a boat in still water is three times the speed of the boat in upstream. If the boat takes 44 minutes to cover 22 km in downstream, then find th...
Ratio of downstream and upstream speed of a boat is 5:2. If the speed of stream is 3 km/h, find the distance travelled by boat in downstream in 2 hours.
The speed of Boat is given as 20 km/hr and 28 km/hr while travelling to Upstream and downstream individually.Then, the boat travelled for ‘T’ hours ...
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...
Speed of a boat in still water to speed of boat in upstream is 12: 11. If the boat can travel 260 km in downstream in 4 hours, then find the time taken ...
Speed of a boat in still water is 15 km/h while the speed of stream is ____ km/h. Total time taken by the boat to go 150 km upstream and 225 km downstre...
If the sum of upstream and downstream speed is 30 km/hr and the speed of the current is 6 km/hr. Then find time taken to cover 84 km in downward?