78.5 ft2(3.14)(5ft)2
20
As it is a hole there is no dirt in it. However, a cylinder of dirt with radius 1.5ft, depth 5ft and a volume of πr2h ~= 35.34 cu ft has been removed.
A circle with a radius of 5 feet has a circumference of 31.4 feet.
the formula to start off with is the circumference is pi x diameter therefore re-arranging the formula the diameter is the circumference divided by pi diameter = circumference / pi = 18ft 8in / 3.1415 = 5ft and 11 inches to the nearest inch (to be more precice to diameter is 5ft 11.3 inches--- note it is more difficult to work in feet and inches and easier to work in metres and centimetres)
Radius is = to half the diameter so.... when the radius of the semicircle is 5ft then the diameter is 10ft.
5ft * Pi = Approximately 15.7ft
diameter = radius x 2 radius = 5ft / 2 = 2.5 ft you may try using the calculator linked below
what is the diameter/radius? pi times the radius squared times the height= volume pi.r^2h
78.5 ft2(3.14)(5ft)2
20
pi * 5 = 15.7079633 Circumference = pi * Diameter
31ft 4.8in
The circumference is about 15.7 feet.
As it is a hole there is no dirt in it. However, a cylinder of dirt with radius 1.5ft, depth 5ft and a volume of πr2h ~= 35.34 cu ft has been removed.
The formula for finding the Area is A = Pi x R-squared, where Pi is 3.1416 and R-squared is the radius multiplied by itself: A = 3.1416 x (5 x 5)= 3.1416 x 25 = 78.54 sq ft. The formula for finding the circumference is C = Pi x D where Pi is 3.1416 and D is the diameter (diameter is Radius x 2): C = 3.1416 x 10 = 31.416 ft.
yes if hes not fat