Question

the side of a triangular plate are 8cm,15cm&17cm & rate of painting on it is 5 rupees per cm2.find the total cost pls tell the ans with method

Answer 1

Step-by-step explanation:

sides are 15cm,17cm,8cm

herons formula for the area

so semi perimeter=a+b+c/2

=15+17+8/2

=40/2

=20

area=root of 20(20-17)(20-15)(20-8)

root of 20×3×5×12

root of 5×2×2×3×5×2×2×3

so 5×2×2×3

=60cm sq

cost=2×60

so rupees 120 is the total cost