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The angle of elevation from a point on t...

The angle of elevation from a point on the bank angle of the top of temple on the other bank is `45^@` Retreating 50m the observer finds the new angle of elevation is `30^@`. What is the width of the river

Text Solution

Verified by Experts

`In/_ABC`
`tan45^0=y/x`
`y/x=1`
`y=x`
`In/_ABD`
`tan30^0=y/(x+50)`
`y/(y+50)=1/sqrt3`
`y=25(sqrt3+1)`
...
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