A ship is sailing in the North-West direction. If it changes its direction towards the South on moving anticlockwise from its present position then by what angle will it turn?

The area of a trapezium is 150 cm^{2} and the distance between its parallel sides is 10 cm. If one of the parallel sides is of length 12 cm, find the length of the other side.

The sides of a quadrilateral, taken in order are ^@ 14 \space cm, 13 \space cm, 12 \space cm,^@ and ^@9 \space cm^@ respectively. The angle contained by the last two sides is a right angle. Find the area of the quadrilateral.

A cone completely made of metal (i.e. it is not hollow) has a base radius of 14 cm, and height of 7 cm. If we melt it and recast it into a sphere, what will be the radius of the sphere?