What is the cross-sectional area of a cement pipe 2 in. thick with an inner diameter of 5 ft? Use pie 3.14.

1.60

Step-by-step explanation:

Assuming that this is a cylindrical pipe, the area can be determined by applying the formula for calculating the area of a circle.

i.e Area =

So that,

for the inner part of the pipe,

r =

 =

 = 2.5 feet

Area of the inner part of the pipe =

                                 = 3.14 x

                                 = 19.625

Are of the inner part of the pipe is 19.63 .

Total diameter of the pipe = 5 + 0.2

                                           = 5.2 feet

r =

 = 2.6 feet

Area of the pipe =

                            = 3.14 x

                            = 21.2264

Area of the pipe is 21.23 .

Thus the cross sectional area = Area of the pipe - Area of the inner part of the pipe

                                           = 21.2264 - 19.625

                                           = 1.6014

The cross sectional area of the cement pipe is 1.60 .

question 1: step-by-step explanation:

1/4 of 84 = 84÷4= 21