The relative velocity of a swimmer with respect to earth is 15km/hr when swimming with the stream and 5km/hr when swimming against stream. Find (i) velocity of water current, (ii)velocity of swimmer in still water.

colorectal cancer may also develop from areas of abnormal cells in the lining of the colon or rectum. this area of abnormal cells is called dysplasia and is more commonly seen in people with certain inflammatory diseases of the bowel such as crohn's disease or ulcerative colitis.

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

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answer///scientific method;