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Question
The perimeter of cross section of cube is 28 metres. What is its lateral surface area?
The perimeter of cross section of cube is 28 metres. What is its lateral surface area?
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Solution
Given perimeter of cross-section of cube=28m
i.e 4a=28,where a is the length of side of cube
therefore, a=28/4=7m
Now,lateral surface area of cube=4a^2
=4*7^2
=4*49
=196m^2
i.e 4a=28,where a is the length of side of cube
therefore, a=28/4=7m
Now,lateral surface area of cube=4a^2
=4*7^2
=4*49
=196m^2
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