Question

a cylindrical iron pipe carrying water is 25 metre long and has a diameter of 7 cm find the cost of painting the pipe at the rate rupees 200 per metre square ​

Answer 1

Answer:

Height of cylindrical pipe h=25m

Diameter of cylindrical pipe d=7 cm

Radius=d/2=7/2=3.5cm

Volume of cylinder=pier^2h

=22/7*(3.5)^2*25

=22/7*12.25*25

=6737.5/7

=962.5cm^3

Cost of painting a pipe for 200mper square=962.5*200/100

=192500/100=1925

Therefore ₹1925 is needed for 200 meter square for painting a pipe

Mark me as a brainlist

Answer 2

The cost of painting the pipe is Rs. 1100.

Step-by-step explanation:

Since we have given that

Length of pipe = 25 m

Diameter = 7 cm

Radius = 3.5 cm = 0.035 m

So, Surface area of pipe would be

$2\pi rh\\\\=2\times \dfrac{22}{7}\times 25\times 0.035\\\\=5.5\ m^2$

Cost of per square meter = Rs. 200

So, Total cost of painting the pipe would be

$200\times 5.5\\\\=Rs.\ 1100$

Hence, the cost of painting the pipe is Rs. 1100.

# learn more:

A cylindrical pipe has an outer diameter of 3 metre and an inner diameter of 2 metre. its length is 12m. it has to be painted on the outer and inner surface. if the rates of painting is rupees 7 per square metre, find the cost of painting the pipe.

https://brainly.in/question/2693653