a metalic pipe has internal and external diameter as 8cm and 12cm. find the volume of the metal used if the pipe is 2.8m long. also, find the weight of the pipe if every 1cubic centimeter weighs 1.2 g.
Answers
Answered by
16
Answer:
let external radius be R =12/2= 6cm
and internal radius be R =8/2= 4cm
hight of pipe= 280cm
Step-by-step explanation:
The volume of the metal pipe = volume of pipe ( external radius)-volume of pipe(internal radius)
= πR^2h-πr^2h
= πh( 6*6-4*4)
= 22/7*280(36-16)
= 22*40*20
= 17600 cm^3
weight of pipe = 17600*1.2 g
= 21120 g
= 21120* 1/1000 kg
= 21.12 kg
Answered by
5
Answer:
let external radius be R =12/2= 6cm
and internal radius be R =8/2= 4cm
hight of pipe= 280cm
Step-by-step explanation:
The volume of the metal pipe = volume of pipe ( external radius)-volume of pipe(internal radius)
= πR^2h-πr^2h
= πh( 6*6-4*4)
= 22/7*280(36-16)
= 22*40*20
= 17600 cm^3
weight of pipe = 17600*1.2 g
= 21120 g
= 21120* 1/1000 kg
= 21.12 kg
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