Question

one side of a right angle triangle scarf is 80cm and its longer side is 1 cm find its cost at the rate of Rs 25 per square metre​

Answer 1

Answer:

Let there is a right-angled triangle with sides AC, AB and BC, and AC be the longest side of this triangle.

So, in Δ ABC AC = 1 m, AB = 80 cm or 0.8 m and BC = ?

AC

2

=AB

2

+BC

2

1

2

=0.8

2

+BC

2

BC

2

=1−0.64

BC

2

=0.36

BC=0.6m

Now, the area of the triangle =

2

1

×base×height

=

2

1

×0.6×0.8

Area of triangle = 0.24sqm

Cost of scarf =250×0.24

=Rs60