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ICSE Class 9 Answered

  1. A closec tea chest is 47 cm long,47 cm wide and 60 cm deep , by internal measurement.Find in square metres the total area of tinfoil needed for lining it
Asked by lakhwindersaggu2 | 19 Feb, 2017, 11:48: AM
answered-by-expert Expert Answer
begin mathsize 16px style Length comma straight l equals 47 space cm Breadth comma space straight b equals 47 space cm Height comma space straight h equals 60 space cm It space is space closed space box. Hence comma space required space area equals Area space of space base plus ARea space of space top plus Lateral space surface space area space of space box equals straight l cross times straight b plus straight l cross times straight b plus 2 left parenthesis straight l plus straight b right parenthesis cross times straight h equals 47 cross times 47 plus 47 cross times 47 plus 2 left parenthesis 47 plus 47 right parenthesis cross times 60 equals 2209 plus 2209 plus 2 left parenthesis 94 right parenthesis cross times 60 equals 2209 plus 2209 plus 11280 equals 15698 space cm squared equals 1.5698 space straight m squared end style
Answered by Rashmi Khot | 20 Feb, 2017, 11:42: AM
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