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A DVD (Digital Versatile Disc) is an optical storage medium, not a magnetic disk. Magnetic disks like Winchester disks, Zip disks, and Disk packs store data magnetically, while DVDs use laser technology to read/write data. Knowledge Booster: 1. Magnetic disks are rewritable and provide random access to data. 2. DVDs are used for multimedia and data distribution. 3. Winchester disks are an older form of hard disks. 4. Zip disks were used for high-capacity storage but are now obsolete.
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 ratio of the speed of boat in upstream to speed of boat in downstream is 7:9. If the boat can cover a total of 70 km upstream and 144 km downstream ...
A boat takes 24 hours to cover 'q' km in still water. While traveling downstream, it takes 16 hours to cover (q - 80) km. If the speed of the boat in st...
A man rows upstream 36 km and downstream 51 km taking 3 hours each. Find the man’s speed in still water.
The speed of the stream is 10 km/h. Boat ‘A’ covers 150 km distance against the stream in 6 hours and boat ‘B’ covers 108 km distance against th...
The speed of the stream is 15 km/h. Boat ‘A’ covers 100 km distance against the stream in 4 hours and boat ‘B’ covers 90 km distance against the...
A boy can swim a certain distance downstream in 3 hours and return in 8 hours. If the rate of stream is 5 kmph then what is the speed of boy in still wa...
A man can row 12 km/hr in still water. If the speed of the current is 3 km/hr, it takes 4 hours more in upstream than in the downstream for the same dis...
The speed of a boat in still water is 25 km/hr. If the boat covers 120 km in upstream in 12 hours, then find the time taken by the boat to travel 160 km...
A boat covers 13 km upstream in 52 min. If the speed of the current is 6 km / h, then in how much time will it cover 40 km downstream?
