Question

The pattern of the iron grills of a window, of area 3.78 m², is in the shape of trapeziums of
height 8 cm, and parallel sides of length 17 cm and 25 cm. How many trapeziums are there
in the grill pattern?​

Answer 1

Answer:

225

Step-by-step explanation:

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.