Question

Q37 A triangular park has sides 120m, 80m and 50m. Ramu has to put a fence all are
and also plant some trees inside the garden to get clean air Then find
(the cost of fencing at the rate of Rs 5 per meter square,
(ii)the area where Ramu plant the trees​

Answer 1

Answer:

Step-by-step explanation:

Area of the triangle is √{ s(s-a )(s-b ) (s-c)}

S = a+b+ c/2

S= 120+80+50/2

S= 125

Herons formula

√{ 125(125-120)(125-80)(125-50)}

√ {125(5)(45)(75)}

√{5*5*5*5*15*3*15*5}

= 5*5*15√15

=375√15

Cost = 375√15× 5 =1875√15 rs

Area where ramu had to plant is 375√15

Thank you