The floral design on a floor is made up of 16 tiles which are triangular the sides of the the triangle begin 9cm,28cm and 35cm . Find the cost of polishing the tiles at the rate of 50p per cm^2.
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area of one tile=√[s(s-a)(s-b)(s-c)] {by heron's formula}
where s=perimeter / 2
=72/2
=36cm
a=9,b=28,c=35
area of one tile=√[36(36-9)(36-28)(36-35)
=√[36×27×8×1]
=√[6×6×27×2×2×2]
=6×2√[27×2]
=12√54
=88.181cm²
area of 16 tiles=88.181×16
=1410.906cm²
cost of polishing=1410.906×50
=70545.304 paise
=705.45304 rs
hope it helps...
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where s=perimeter / 2
=72/2
=36cm
a=9,b=28,c=35
area of one tile=√[36(36-9)(36-28)(36-35)
=√[36×27×8×1]
=√[6×6×27×2×2×2]
=6×2√[27×2]
=12√54
=88.181cm²
area of 16 tiles=88.181×16
=1410.906cm²
cost of polishing=1410.906×50
=70545.304 paise
=705.45304 rs
hope it helps...
mark as brainliest if useful✌✌✌
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