1.

A ladder of 20 mt long reaches a point 20 mt below the top of a flag staff. If the angle of elevation of the top of the flag staff at the foot of the ladder is60 ^(@)then the height of the flag staff is

Answer»

` 10 (sqrt3-1) `
` 300( sqrt3+1) MT`
` 120 ( sqrt3-1) `
` 30 mt `

Answer :D


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