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?
Mr. A bought a laptop with \(16 {{2} \over 3}\) % discount on the labeled price. Had he bought it with 25% discount, he would have saved Rs 600. At what price did he buy the laptop?
The tops of two poles of height 24 m and 36 m are connected by wire. If the wire makes an angle of 60° with the horizontal, then the length of the wire is.