the dimension of a solid iron cuboid are 4.4m*2.6*1.0. it is melted and recast into a hollow cylindrical pipe of 30cm inner radius and thickness 5cm. find the length of the pipe
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The Volm of cuboid= 4.4×2.6×1.0
=11.44 m cube
=11440000 cm cube
The Volm of pipe= pi × length (R sq - r sq)
The Volm of pipe= pi × length (R + r)(R-r)
The Volm of pipe= pi × length (35 + 30)(35-30)
11440000=22/7×length (65)(5)
11440000×7/22=325×length
3640000/325=length
length = 11200
= 112 meter
plz.. make me brain list
=11.44 m cube
=11440000 cm cube
The Volm of pipe= pi × length (R sq - r sq)
The Volm of pipe= pi × length (R + r)(R-r)
The Volm of pipe= pi × length (35 + 30)(35-30)
11440000=22/7×length (65)(5)
11440000×7/22=325×length
3640000/325=length
length = 11200
= 112 meter
plz.. make me brain list
navvi123:
I didnt understand the steps
u hv put square of radius as (35+30)(35-30) but square of radius is 35 square
i didnt understand thet step
i use property (a-b) sq = (a+b)(a-b)..
(R-r)sq=(R+r)(R-r) like this.. where, R= outer radius and r= inner radius
ignore this above 2 comments
make me brain list
hii
hii
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