After an earthquake, 70 people of the affected community are required to be housed in several tents. Each tent is conical in shape, and must be large enough to allow a family of four to live in it and sleep in it. The radius of the floor space it takes up should be 3 metres, and the tallest human in each family would be around 2 metres. How much material is required to make up the tent? 

 Solve the problem above, giving the stages involved while doing so. 

To determine the amount of material required to make up the tent, we need to calculate the surface area of the conical shape. Here are the stages involved in solving the problem:

Find the slant height of the cone:
The slant height can be calculated using the Pythagorean theorem, where the height is the vertical distance from the apex of the cone to the floor, and the radius is half of the floor diameter. Using the given information, the height can be calculated as follows:

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