Question

a school started a campaign against the habit of taking junk food. 10 students were asked to prepare banners in a triangular shape.the sides are 8cm,15cm,17cm.if the cost of the banners is rs3 per 100 sq cm, find the total cost of the banners.

Answer 1

In this question, we will check are these dimensions a Pythagorean triplet.
8^2 + 15^2 = 17^2 i.e. 64+225 = 289 .
Yes , it is .So, the longer side will be Hypotenuse and rest will be height and base.
Now, Area of each banners = 1/2*8*15 = 60 sq.cm
No. of banners = 10.
Total area of banners = 60*10 = 6*100 sq.cm
Now,
Cost of per 100 sq.cm banner is Rs 3.
So, total cost = 6*3 = Rs 18.