Question
What will be the colour reaction with iodine of a plant
kept in dark for few days?Solution
If a plant is kept in the dark, it will not photosynthesize and starch cannot be produced, so the iodine test for starch will turn yellow or brown instead of deep blue.
A man can row 5 km/hr in still water. If the speed of the current is 2 km/hr, it takes 4 hours more in upstream than in the downstream for the same dist...
A boat can cover 143 km in downstream in 11 hours and 120 km in upstream in 12 hours. Find the speed of boat in still water
The speed of a boat in still water is 25 km/hr. If the boat covers 160 km in upstream in 10 hours, then find the time taken by the boat to travel 204 km...
A boat can travel 270 km downstream in 9 hours and 63 km upstream in 14 hours. Find the speed of the current.
- In still water, a boat travels 63 km in 3 hours. If the speed of the stream is 6 km/h, then what is the percentage increase of downstream speed compared to...
If the sum of upstream and downstream speed is 32 km/hr and the speed of the current is 6 km/hr. Then find time taken to cover 44 km in downward?
A motorboat covers 600 km downstream in 25 hours. If it can cover 240 km in still water in 12 hours, then find the time taken by the boat to cover 840 ...
If the sum of upstream and downstream speed is 20 km/hr and the speed of the current is 5 km/hr. Then find time taken to cover 45 km in downward?
Ratio of still water speeds of three boats is 3:4:5. The first boat travels downstream, the second and third boats travel upstream. They travel in strea...
A boat travels in a river where the current flows at a speed of 5 km/h. The total time taken by the boat to go from point 'P' to ...
