A diver in a lake wants to signal his distress to a person sitting on the edge of the lake flashing his waterproof torch. He should direct the beam

A diver in a swimming poole wants to signal his distress to a person lying on the edge of the pool by flashing his water proof flash light

A diver in a swimming poole wants to signal his distress to a person lying on the edge of the pool by flashing his water proof flash light

A man at the bottom of a pool wants to signal to a person lying at the edge of the pool. The man should beam his water proof light ___________ .

A boat man could row his boat with a speed 10 m/sec. He wants to take his boat from P to a point Q just opposite on the other bank of the river flowing at a speed 4 m/sec. He should row his boat–

A boat man could row his boat with a speed 10 m/sec. He wants to take his boat from P to a point Q just opposite on the other bank of the river flowing at a speed 4 m/sec. He should row his boat–

If a man wants to hit a target, he should point his rifle-

In a lake, stream direction is as shown in the figure. A man starting from the point P on the bank wants to move to the otherside of the bank in shortest time .Then direction in which he should swim

A fat person is standing on light plank floating on a calm lake. The person walks from one end to the other on the plank. His friend sitting on the shore watches him and finds that the person hardly moves any distance because the plank moves basckward about the same distance as the person moves on the plank. Explain.