Question

the cost of painting the wall at a rate of rupees 8 per metre second square is (use = √21.4​

Answer 1

Answer:

Given: 

⇒Sides: a=15m, b=11m and c=6m

⇒P=15+11+6=32m

⇒Semi perimeter=S=232, S=16m

⇒A=s(s−a)(s−b)(s−c) (Heron's formula)

⇒A=16(16−15)(16−11)(16−6)

⇒A=16×1×5×10=800=202 m2