Question

a rectangular hollow pipe is made of 1 cm thick iron sheet if the length of the pipe is 2 metre and the other outer dimensions of the pipe are 10 cm into 8 cm then find the weight of the pipe if 80cm cube of iron weighs 1 kg help fast

Answer 1

OUTER VOLUME.
Length:200cm
Breadth:10cm
Height:8cm
So
Outer volume
200×8×10=16000cm^3
INNER VOLUME
LENGTH:200cm
BREADTH:8cm
HIEGHT:6cm
INNER VOLUME
200×8×6=6400cm^3
Actual volume of pipe=16000-6400=9600cm^3
Weight of pipe=
9600/80=120kg