Question

a hollow cylindrical pipe is 1.5m long. If outer and input diameter are 12cm and 10 cm. Find the volume of metal use making the pipe

Answer 1

Step-by-step explanation:

Outer diameter=12 cm

Outer radius,(R)=12/2=6cm

Inner diameter=10cm

Inner radius,(r)=10/2=5cm

Length of pipe=height of pipe=1.5m=150cm

Therefore volume=

$\frac{22}{7} \times (6 {}^{2} - 5 {}^{2} ) \times 150$

$= \frac{22}{7} \times (36 - 25) \times 150 \: cm {}^{3 } \\ = \frac{22}{7} \times 11 \times 150 \: cm {}^{3} \\ = \frac{36300}{7} \\ = 5185.714 \: cm {}^{3}$

I hope it will hepl you