Question
What is the function of white blood cells
(WBCs)?Solution
White blood cells (WBCs) are a key part of the immune system. They help protect the body by identifying and destroying pathogens like bacteria, viruses, and other foreign invaders. Red blood cells carry oxygen, platelets aid in clotting, and nutrients are stored by other body cells, not WBCs.
The speed of a boat in still water is 8 km/hr and speed of current is 4 km/hr. If time taken to cover a certain distance upstream is 12 hours, then how ...
A boat moves at 40 km/hr downstream and 10 km/hr upstream. How long will it take to cover 150 km in still water?
A boat takes 3 hours to travel 24 km downstream and 4 hours to travel 16 km upstream. What is the speed of the current?
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A boat running downstream covers a distance of 30 km in 2 hrs and covering the same distance upstream in 10 hrs. What is the speed of a boat in still wa...
Speed of boat is 15 km/hr. Speed of the stream is 20% less than speed of boat. Then find time taken by boat to go 108 km downstream?
Boat ‘A’ can cover 160 km in still water in 8 hours. In still water, if the ratio of the speed of boat ‘A’ to that of ‘B’ is 4:3 and the spe...
Speed of current is equal to 15% of speed of boat in still water. If the boat takes 3 hours to cover 120 km in still water, then find the time taken by ...
A man can row one quarters of a kilometer against the stream in 30/4 minutes and return in 5/2 minutes. The speed of the man in still water is:
