Question
Which of the following statement is correct about
cells? I. Cell membrane is absent in plant cell II. Cell wall is present in animal cellSolution
Cell membrane is the outermost membrane present in animal cells whereas, plant cell consists of cell wall as well as plasma membrane. Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane.
The speed of current is 40 km/hr. If the speed of the boat in still water had been 10 km/hr more than the original speed then it would take 5.5 hours to...
A boat can travel 36 km downstream in 40 min. The ratio of the speed of the boat in still water to the speed of the stream is 5: 4. How much time will t...
The ratio of the speed of boat ‘A’ in still water, the speed of boat ‘B’ in still water and the speed of the current is 6:4:2, respectively. If ...
When travelling downstream, a boat takes 7 hours to travel 280 km. If the speed of the stream is (2/5)th of downstream speed of the boat, the...
The speed of boat downstream and upstream is 28 km/hr and 18 km/hr respectively. Time taken to travel a distance of (m + 35) km downstream and (n + 22) ...
A boat can travel 26 km downstream in 30 min. The ratio of the speed of the boat in still water to the speed of the stream is 8: 5. How much time will t...
A boat can cover 110 km in upstream in 11 hours and 140 km in downstream in 7 hours. Find the speed of the stream.
A boat covers a distance of 240 km downstream in 8 hours. If the ratio of upstream speed to downstream speed of the boat is 2:5, then find the distance ...
The speed of a boat while moving upstream is 20% less than its speed in still water. The boat covers a distance of 348 km downstream in 7 hours and 15 m...
The speed of current is 22 km/hr. If the speed of the boat in still water had been 25 km/hr more than the original speed then it would take 5.5 hours to...
