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Conduction is the transfer of heat by molecular activity. As the first molecules are heated, they are speeded up and this energy is transferred to adjacent molecules. In soil, heat transfer is mainly due to conduction
The speed of a boat is that of the current of water is 40:3. The boat goes along with the current in 3 hours 8 minutes. It will come back in
A boat can cover 200 km in downstream in 10 hours and 150 km in upstream in 15 hours. Find the distance travelled by the boat in still water in 5 hours.
The Ship's speed in calm water exceeds that of the current by 20%. After sailing downstream for 4 hours, it traveled upstream for 4 hours with an increa...
The speed of a boat in still water is 20 km/hr. If the boat covers 90 km in upstream in 9 hours, then find the time taken by the boat to travel 150 km i...
Speed of a boat in still water is 15 kmph and speed of stream is 13 kmph. A man rows to a place at a distance of 56 km and come back to starting point. ...
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 ...
A boat can cover ‘y’ km distance downstream in (t+2.5) hours. The same boat can cover ‘0.25y’ km distance upstream in ‘t’ hours. The time ta...
The speed of a boat in calm water is 4 km/hr greater than the speed of the stream. The boat travels a distance of 280 km downstream and 200 km upstream ...
The boat's speed in still water is 20% greater than the speed of the stream. If it takes the boat 4 hours more to travel 176 km d...
Speed of boat is 10 km/hr. Speed of the stream is 20% less than speed of boat. Then find time taken by boat to go 54 km downstream?
