Q. 184.1( 15 Votes )
A floral design on a floor is made up of 16 tiles, each triangular in shape having sides 16 cm, 12 cm, and 20cm. Find the cost of polishing the tiles at Re 1 per sq cm.

Answer :
Let the sides of the triangle be:
a = 16 cm
b = 12 cm
And,
c = 20 cm
Now we have to find out the value of s:
s =
=
= = 24 cm
We know that,
Area of triangle =
Therefore,
Area of triangular tile =
=
= 2 × 2 × 2 × 2 × 2 × 3
= 96 cm2
Therefore,
Area of one tile = 96 cm2
Hence,
Area of 16 such tiles = 96 × 16 = 1536 cm2
Now,
Cost of polishing the tiles per square cm = Rs. 1
Therefore,
Total cost of polishing the tiles = 1 × 1536
= Rs. 1536
Rate this question :
















A piece of land is in the shape of a rhombus ABCD in which each side measures 100m and diagonal AC is 160m long. Find the area of the rhombus.
The question consists of two statements namely, Assertion (a) and Reason (R). Please select the correct answer.
Find the area of the trapezium PQRS with height PQ given in Fig. 12.3