Question

A floral design on a floor is made up of 16 tiles which are triangular,
the sides of the triangle being 9cm, 28cm and 35cm. Find the cost of
polishing the tiles at the rate of 50p per m^2?

Answer 1

Answer:

Answer

Area of tiles = 16 x area of 1 Δ

S=  

2

a+b+c

​  

=  

2

9+28+35

​  

=  

2

72

​  

=36

Area=  

36(36−9)(36−28)(36−35)

​  

 

36×27×8×1

​  

 

36  

6

​  

cm  

2

 

Area of tiles = 16 ×36  

6

​  

 

=1410.20.

Cost of polishing per cm  

2

 = 50.

Cost of polishing = 1410.90 cm  

2

 

1410.90 x  

2

1

​  

 

705.45

Step-by-step explanation: