11. The four cylindrical steps are placed in a stream to enable crossing. The radius of each step is
21 cm, and the heights are each 1 metre. Calculate the volume of sand, gravel and cement
22
used to lay all four steps. Use π=22
7
​

The answer to the question is d

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.

The breaking apart of glucose, which involves spontaneous reactions