A balloon leaves the earth at a point A and rises vertically at uniform speed. At the end of 2 minutes, John finds the angular elevation of the balloon as 60°. If the point at which John is standing is 150 m away from point A, what is the speed of the balloon?

A balloon leaves the earth at a point A and rises vertically at unifor

1.	A balloon leaves the earth at a point A and rises vertically at uniform speed. At the end of 2 minutes, John finds the angular elevation of the balloon as 60°. If the point at which John is standing is 150 m away from point A, what is the speed of the balloon?
A.	.63 meter/sec
B.	.16 meter/sec
C.	.87 meter/sec
D.	.72 meter/sec
Answer» C. .87 meter/sec