hello please answer with complete solution and explanation especially to no. 1 and 2. :) will appreciate it a lot.. thank you!

1.The base of a right parallelepiped is a rhombus whose sides are each 10 cm long and one

of whose angles is 60 degrees. If the altitude of the parallelepiped is 4 cm, find its volume .

A. 1003 cm3 B. 2003 cm3 C. 3003 cm3 D. 4003 cm3

2.A stone is dropped into a circular tub 40 inches in diameter, causing the water therein to

rise 20 inches. What is the volume of the stone ?

A. 6000 in3 B. 7000 in3 C. 8000 in3 D. 9000

3.Two points A and B, 150 m apart lie on the same side of a tower on a hill and in a

horizontal line passing directly under the tower. The angles of elevation of the top and bottom of

the tower viewed from B are 42 and 34 respectively and at A, the angle of elevation of the

bottom is 10. Find the height of the tower.

A. 7.3 m B. 8.3 m C. 9.3 m D. 10.3 m

4.A ship sails on a course between south and east making a difference in latitude of 13

nautical miles and a departure of 20 nautical miles. Find the course of the ship.

A. 5456'43" E C. 5658'34" E

B. 5553'84" E D. 5854'36" E