Question

minimum of @@ ....m 44. Every storage/warehouse building should have a .exit doorways, at the rate of one exit doorway per every length of the external walls of the building. (A) 3,25 (B) 4, 20 (C) 2,30 (D) 1,35​

Answer 1

Step-by-step explanation:

Let external point be B. OA be radius of circle.

Given:

OB=12.5 cm

AB=12 cm

In right triangle, AOB, by Pythagoras Theorem,

OB

2

=AB

2

+OA

2

AO

2

=OB

2

−OA

2

=12.5

2

−12

2

=12.25

∴AO=3.5 cm

Diameter=2(AO)=2(3.5)=7 cm