Question

# A boy carved his initials on the bark of a tree at a height of 2.5m above the ground when the tree was 5m tall. In 10 years the tree attained a height of 15m. The initials carved by the boy 10 years ago will now be found.

A
At 12.5m above the ground
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B
At 7.5m above the ground
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C
At 2.5m above the ground
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D
At 15.0m above the ground
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Solution

## The correct option is B At 7.5m above the ground Intial height of tree =5 m Initial height of initids =2.5 m i.e initials carved at the middle of the tree. ∴ after l0 years, each section of tree would have been grown in height, therefore the initials would still be carved at the centre of the tree after l0 years. Height of tree after l0 years =15 m Height of initials after l0 years =152 m=7.5 m

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