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A boy 1.5 m tall standing from a lamp at...

A boy 1.5 m tall standing from a lamp at a distance of 3m. The lamp casts a shadow of 4.5 m. Find the height of the lamp.

Text Solution

Verified by Experts

`/_ABE & /_CDE`are similar
`(DE)/(AD+DE)=(CD)/(AB)`
`4.5/(3+4.5)=1.5/h`
`4.5/7.5=1.5/h`
`hxx10=25`
`h=2.5m`
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