Question

floral design on a floor is made up of 16 tiles which are triangular the sides of the triangle 9 CM 8 cm and 5 cm find the cost of polishing at the rate of 50p per cm2
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Answer 1

Answer:

Step-by-step explanation:

In triangle

a = 9 ; b = 8 ; c = 5

S = (a+b+c)/2

= (9+8+5)/2

= 22/2

= 11

Area of tile =[root 11×(11-9)×(11-8)×(11-5)]

=[root 11×2×3×6]

= [root 11×2×3×2×3]

= 2×3×[root 11]

= 6 root 11 cm^2

Area of 16 tiles = 16 × 6 root 11

= 96 root 11

1 cm^2 = 0.5 rupees

96 root 11 = 96 root 11 × 0.5

= 159.19 rupees

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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