21.The shadow of a tower standing on a ground level is formed to be 40 m longer when theSun's altitude is 30 than when it is 60%Find the height of the tower.24. Two windmills of height 50 m and 40 m are on either side of the field. A person observesthe top of the windmills from a point in between the towers. The angle of elevation wasfound to be 45 in the both cases. Find the distance between the windmills.

21.The shadow of a tower standing on a ground level is formed to be 40

1.	21.The shadow of a tower standing on a ground level is formed to be 40 m longer when theSun's altitude is 30 than when it is 60%Find the height of the tower.24. Two windmills of height 50 m and 40 m are on either side of the field. A person observesthe top of the windmills from a point in between the towers. The angle of elevation wasfound to be 45 in the both cases. Find the distance between the windmills.
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