Question : From an aeroplane just over of river, the angle of depression of two palm trees on the opposite bank of the river is found to be $60^{\circ}$ and $30^{\circ}$, respectively. If the breadth of the river is 400 metres, then the height of the aeroplane above the river at that instant is: $(\sqrt{3} = 1.732)$

Option 1: 173.2 metres

Option 2: 346.4 metres

Option 3: 519 .6 metres

Option 4: 692.8 metres

Question : A pilot in an aeroplane at an altitude of 200 metres observes two points lying on either side of a river. If the angles of depression of the two points be $45^{\circ}$ and $60^{\circ}$, then the width of the river is:

Option 1: $(200+\frac{200}{\sqrt{3}})$ metres

Option 2: $(200-\frac{200}{{\sqrt3}})$ metres

Option 3: $400 {\sqrt3}$ metres

Option 4: $(\frac{400}{{\sqrt3}})$ metres

Question : ______ is a tributary of River Godavari.

Option 1: Tawa

Option 2: Banas

Option 3: Indravati

Option 4: Chambal

Question : Which of the following is not a tributary of River Kaveri?

Option 1: Musi

Option 2: Bhavani

Option 3: Hemavati

Option 4: Kabini

Question : Which is the biggest tributary of the upper Brahmaputra that originates in the Tibetan Himalayas and winds its way into India through Arunachal Pradesh?

Option 1: Subansiri

Option 2: Yerla

Option 3: Musi

Option 4: Aner