Question

a floral design on a floor is made up of 16tiles which are triangular the side of the triangle being 9cm, 28cm, 36cm find the cost of polishing tiles at the rate of 50p per cm²

Answer 1

$7871 - 456$

Answer 2

Answer:

₹ 705.60

Step-by-step explanation:

Sides of a triangle are:

A – 9

B-28

C-35

S = a+ b+ c/2

=9+28+35/2

=72/2 =36 cm

Area of triangle = √s(s-a)(s-b)(s-c)

=√ 36(36-9)(36-28)(36-35) cm²

=√36*27*8*1 cm²

=3*2*3*2√3*2 cm²

=36√6 cm²

=(36*2.45) cm ²

=88.2 cm² (apx)

Area of 16 triangles  

= (16*88.2) cm²

=1411.2 cm²

Rate of polishing = ₹ 0.5 /cm²

=(0.5*1411.2)=₹ 705.60

Hope it helps

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