Problem 1:The greater part of the earth's surface (r = 6371 km) is covered by oceans; their area is approximately 71% of the Earth's surface. What is the approximate area of the land?
Problem 2:
What is the surface area of the cylinder when its volume is 45 liters and the perimeter of base is three times of the height?
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Problems from M-03/11/21
Problem 1:A rhombus have sides of 170 meters and diagonal of 300 meters. What is the area of the rhombus?
Problem 2:
The hemisphere container is filled with water. What is the radius of the container if it holds 10 liters of water?
Congratulations to Ramachandran Balakrishna, who was the winner of the last set of problems.