An elevator descends into a mine shaft at the rate of 6 m/ min. If the descends starts from 10 m above the ground level,how long wiil it take to reach - 350 m.
From a point on the ground, the angles of elevation of the bottom and the top of a transmission power fixed at the top of a 20m height building are 45 degree and 60 degree respectively. Find the height of the tower.
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