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The angles of elevation of the top of a building from the top and bottom of a tree are x and y respectively. If the height of the tree is h meter then, in meter, the height of the building is:
At a certain rate per annum, the simple interest on a sum of money for one year is Rs. 260 and the compound interest in the same sum for two years is Rs 540.80/-. The rate of interest per annum is
Pipes A, B and C can fill a tank in 15, 30 and 40 hours, respectively. Pipes A, B and C are opened at 6 a.m., 8 a.m. and 10 a.m., respectively, on the same day. When will the tank be full?