1.

The angle of elevation of the top of the tower is 45^(@) on walking up a slope inclinde at an angle of 30^(@) to the horizontal a distance20 meters, the angle of elevation of top of tower is observed to be 60^(@). The height of the tower is

Answer»

` 5 SQRT2 `
` 7 sqrt2`
` 4 sqrt2`
` 5`

ANSWER :A


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