Placement Papers - 1.There is log weighing 30kgs. The log having twice thickness and twice short as first one will weig

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

Total Answers and Comments: 4

Last Update: June 26, 2008 Asked by: riyaz

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May 23, 2006 02:20:21

amitjhun

Member Since: March 2006 Contribution: 2

RE: 1.There is log weighing 30kgs. The log having twic...

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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June 08, 2006 02:40:18

Mayank

RE: 1.There is log weighing 30kgs. The log having twic...

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

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June 11, 2006 09:02:33

smriti

RE: 1.There is log weighing 30kgs. The log having twic...

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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June 26, 2008 23:52:11

manishraj_1986

Member Since: June 2008 Contribution: 1

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

as mass density * volume
volume of cylinder pi*r^2*l
so new mass 60kg

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