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ICSE Class 10 Answered

a closed cylindrical tank made of thin iron sheet has diameter = 8.4 m and height = 5.4 m. how much metal sheet, to the nearest sq. m, is used in making this tank, if 1/15 of the sheet actually used was wasted in making the tank
Asked by Sayeeda | 17 Feb, 2018, 08:02: PM
answered-by-expert Expert Answer
begin mathsize 16px style Diameter space of space cylinder equals 8.4 space straight m rightwards double arrow Radius equals 4.2 space straight m
Height equals 5.4 space straight m
Toal space surface space area space of space cylinder equals 2 πr left parenthesis straight r plus straight h right parenthesis equals 253.44 space straight m squared
Wasted space metal space sheet equals 1 over 15 cross times 253.44 equals 16.896 space straight m
Total space metal space sheet space required equals 253.44 plus 16.896 equals 270 space straight m end style
Answered by Rashmi Khot | 17 Feb, 2018, 08:46: PM
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