the patern of the iron grill of a window of area 3.78m^2 is in the shape of trapezium of h eight 8cm and parallel sides of length 17cm and 25cm .how many trapezium are there in the grill pattern ?
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Given that Area of a window = 3.78m
= 37800cm^2.
Given that two parallel sides = 17cm and 25cm, height = 8cm.
We know that Area of trapezium = 1/2 * sum of parallel sides * height
= 1/2(17 + 25) * 8
= 42 * 4
= 168cm^2.
Hence the number of trapeziums in the grill pattern = 37800/168
= 225.
Therefore the total number of trapeziums = 225.
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