Question

You have a friend in your class.who wants to learn swimming but he scared of water.

Answer 1

We should firstly make him to stand in the deep water with the supervision of trainers. Then we can also join swimming to motivate him/her. We should motivate him/her to swim in shallow water(using floaters and water tubes.) . 

Answer 2

Problems - He will become more scared of water when he tries to learn swimming.The other children who have come to learn swimming will make fun of that child and the trainer will also scold him.
Solution - I would tell him that there is nothing to be scared of water.I will ask him/her what happens to him/her when he/she gets into water or when she/he sees water.I will also learn swimming along with him/her to provide support.I will advise that child to have more practice in swimming .This will probably help that child.