# DRD Communications Interview Questions

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###### A cube of edge 15 cm is immersed completely in a rectangular vessel containing water. If the dimensions of the base of vessel are 20 cm × 15 cm, find the rise in water level. A. 11.25 cm B. 10.25 cm C. 9.25 cm D. 8.25 cm
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###### How many times are he hands of a clock at right angle in a day ? A. 34 B. 44 C. 54 D. 64
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###### Pipe A and Pipe B can fill a tank in 20 minutes and 30 minutes respectively. Pipe C can empty the tank in 60 minutes. The tank is initially empty. Both the pipes A and B are A. 11.5 minutes B. 12.5 minutes C. 13.5 minutes D. 14.5 minutes
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###### Sum of the perimeters of a circle and a square is 1. If sum of the area is least, then A. side of the square is 1/2 of the radius of the circle B. side of the square is equal to radius of the circle C. side of the square is double the radius of circle D. none of these
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