Question

Please tell me answer

Answer 1

Area of triangular park=(by heron's formula)
$s = \frac{a + b + c}{2} = \frac{120 + 80 + 50}{2} = 125 \\ now \: \sqrt{(s(s -a )(s - b)(s - c)) } \\ = \: \sqrt{(125 \times 5 \times 45 \times 75)} =$
$\sqrt{5 \times 5 \times 5 \times 5 \times 3 \times 3 \times 5 \times 5 \times 5 \times 3}$