the volume of a metallic cylinder is 748 cubic cm. its length is 14 cm and its external diameter is 9 cm. find its thickness.
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the volume of the metallic cylinder=π(R²-r²)h
=748=22/7(4.5²-r²)14
=748/22=2(20.25-r²)
=34=2(20.25-r²)
=17=20.25-r²
=17-20.25=-r²
=-2.25=-r²
r=±1.5
and hence the thickness=4.5-1.5=3 cm
plzz mark my answer as brainliest .and any queries then let me know.
=748=22/7(4.5²-r²)14
=748/22=2(20.25-r²)
=34=2(20.25-r²)
=17=20.25-r²
=17-20.25=-r²
=-2.25=-r²
r=±1.5
and hence the thickness=4.5-1.5=3 cm
plzz mark my answer as brainliest .and any queries then let me know.
cady1:
but the answer in my book is given 1 cm
i have also done it
plzz read the statements
hmm
i have written that thickness =external diameter-internal diameter=2
i meant 1
oh i havent noticed the answer thank you
sorry i had made a silly mistake
hope u don't mind it
but i have corrected it
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