Question

The area of a circle is 81π sq.cms. Find the length of the arc subtending an angle of 150o at the centre and the area of answer it urgent​

Answer 1

Answer:

Given height of wall needed =2.88m

Width of wall needed =50cm =0.5m

Given length of 1 brick =12cm

Breadth of 1 brick =10cm

Area of 1 brick =12×10=120cm

2

Area of wall needed =2.88×0.5

Area =14.40m

2

Now number of bricks needed =

Areaofbrick

Areaofwall

No. of bricks needed =

120

14.40×10

4

=

120

1440×100

[number of bricks needed =1200].