A floral design on a floor is made up of 16 tiles
which are triangular, the sides of the triangle
being 9 cm, 28 cm and 35 cm (see Fig. 12.18).
Find the cost of polishing the tiles at the rate
of 50p per cm
Answers
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
plz Mark as brainliest
Answer:
Step-by-step explanation:
₹ 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
plz Mark as brainliest