The volume of a metallic cylinder is 748cucm. It's lengths is 14cm and its external radius is 9cm Find its thickness.
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let,R Be the outer radius
r. be inner radius
height = 14 cm
volume = 748 cm3
, v=π[ R² - r²]h
748=22/7 (9²-r²) × 14
748=44(9²-r²)
, 748/44= 81-r²
17=81-r²
-64= -r²
= r² = 64
r = 8
thickness = R-r =9-8=1
thickness =1 cm
r. be inner radius
height = 14 cm
volume = 748 cm3
, v=π[ R² - r²]h
748=22/7 (9²-r²) × 14
748=44(9²-r²)
, 748/44= 81-r²
17=81-r²
-64= -r²
= r² = 64
r = 8
thickness = R-r =9-8=1
thickness =1 cm
natsuelan777:
How did you get 9
it has been given in the question itself. , outer radius is 9 cm
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