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A timber merchant bought 2 logs of wood ...

A timber merchant bought 2 logs of wood from a forest & named A & B , The log A was 50 year old & B was 20 years old. Which log of wood will last longer for the merchant ? Why ?

Text Solution

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(i) The log A which was 50 years old will last longer for the merchant.
(ii) In a tree the centre part of the wood will be darker in colour and is called heart wood or duramen. Outer part of wood is called sap wood and is lighter in colour.
(iii) Sap wood is the living part of the wood formed newly.
(iv) The heart wood stops conducting water as the vessels are blocked by tyloses and becomes dead forming hardest part of the wood as the years go by.
(v) In the wood which is 50 years old the amount of heart wood would be large due to ageing. it would be more durable and can also resist microbes.
(vi) Log B which is only 20 years old will have lesser heart wood as compared to log A.
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