The aeroplane flew (over/above) the clouds. which prepositions is correct?

The angles of elevation of an aeroplane flying vertically above the ground,as observed from the two consecutive stones,I km apart, are 45^(@) and 60^(@) aeroplane from the ground .The height of the aeroplane above the ground in km is: ]

From an aeroplane above a straight road the angle of depression of two positions at a distance 20 m apart on the road are observed to be 30^(@) and 45^(@) . The height of the aeroplane above the ground is :

From an aeroplane above a straight road the angles of depression of two positions at a distance 20 m apart on the road are observed to be 30^(@) and 45^(@). The height of the aeroplane above the ground is

From an aeroplane vertically above a straight horizontal road,the angles of depression of two consecutive mile stones on opposite sides of the aeroplane are observed to be alpha and beta . Show that the height in miles of aeroplane above the road is give by (tan alpha tan beta)/(tan alpha+tan beta)

A devasting cloud burst swept over Leh on August 2010 . Which one of the following statements with regard to cloud Burst is not correct

From an aeroplane vertically over a straight horizontal road, the angles of depression of two consecutive milestones on opposite sides of the aeroplane are observed to be alpha and beta . The height of the aeroplane above the road is