1.There is log weighing 30kgs. The log having twice thickness and twice short as first one will weigh howmuch ?

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amitjhun

  • May 23rd, 2006
 

Hi. I didn't get the part 'twice short'.

Anyway if we consider it half in length then it weighs 60 kg and if we consider it twice in length then 240 kg

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Mayank

  • Jun 8th, 2006
 

the answer 2 this prob is that the log wid 2 thickness n half long wud be Twice heavier than d previous log.

reason is : volume of cylinder is : pi*r*r*h , so r=2r n h=h/2 , so volume gets twice

smriti

  • Jun 11th, 2006
 

the radius becomes 2 times ie. r=2r now (due to twice thickness) and h=h/2 so height is now half.

so the ans is 60 acc to the formula pi*r^2*h

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