Question

a floral design on the floor is made up of 16 types which are triangular. the sides of the triangle are being 9 CM, 28 cm and 35 cm. find the cost of polishing the tiles at the rate of 50 per cm sq.

Answer 1

first find out the area of the triangle
by heron's formula
s=(9+28+35)/2
s=36
A={36(36-9)(36-28)(36-35)}^1/2
A=6×16
A=96 sq units
now area of design 16×96
the cost will be
50×16×96

that's it by my side

Answer 2

Hello mate =_=

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Solution:

Semi-perimeter of 1 triangular tile 

=s

=(9+28+35)/2=72/2=36 cm

Using Heron's formula, Area of 1 triangular tile 

=√{s(s−9)(s−28)(s−35)}

=√{36(36−9)(36−28)(36−35)}

=√{36×27×8×1}

=88.2 cm^2   (approx.)        

⇒ Area of 16 triangular tiles =16×88.2=1411.2 cm^2.

Polishing of 1 cm^2 of area costs 50 p

Polishing of 1411.2 cm^2 of area would cost =50×1411.2=70560p= Rs 705.60

hope, this will help you.

Thank you______❤

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