A 18 ft ladder leans against a wall. The bottom of the ladder is4 it from the wall at time I = 0 and slides away tren'l the wall at a rate of lfsec. Find the velocity of the top of the ladder at time I = 1 . The velocity of ladder at time t = l is fsec. A conical tank has height 3 n1 and radius 2 rn at the lap. Water flows in at a rate of 2.3m3l'min. Howfaat is the water level rising when It is 1.4 rn? (Use decimal nc'ta'tlon. Give your answer In 'lhnee decimal places.) The speed cf'lhe water level rislng is = mimin help [decimals]