Question

Which is closest to the total area in square feet of the foundaton?
(diagram in question))

Answer 1

2328

Answer 2

how'd you get that answer?

Answer 3

@k.rajabhishek

Answer 4

\[c=2 \pi r,\pi r=40,r=\frac{ 40 }{ \pi }\]
\[area=25*16+32.5*\frac{ 80 }{ \pi }+\frac{ \pi \left( \frac{ 40 }{ \pi } \right)^2 }{ 2 }\]
calculate it.

Answer 5

\[area=400+\frac{ 2600 }{ \pi }+\frac{ 800 }{ \pi }=400+\frac{ 3400 }{ \pi }=?\]

Answer 6

can you explain it because im confused. @surjithayer

Answer 7

in order to get the length of the 2nd rectangle, you need to find the diameter of the semicircle on the right.

Answer 8

length=diameter=2*radius
\[=2*\frac{ 40 }{ \pi }=\frac{ 80 }{ \pi }\]
circumference of circle\[=2 \pi r\]
circumference of semi circle\[=\frac{ 2~\pi~r }{ 2 }=\pi~r\]

Answer 9

now any problem.

Answer 10

i cant figure out the area of the semi circle

Answer 11

you have to find the diameter first
since it is a semicircle then we can find the diameter by using
pi*d=80 (40 x 2=80)
d=80/pi

Answer 12

so 80^2 x 3.14?

Answer 13

80/pi=diameter
so radius=40/pi
now we plug that into the equation A=(pi x r^2)/2 since it is a semicircle

Answer 14

so the area of the semicircle would be