The broad tree-lined roads were named after ________________

Q. The Sunderban delta is named after a type of tree.

Q. A person standing on the road is ________ with respect to trees near the road and ________ with respect to a person sitting in a moving bus.

Q. There is a ring road connecting points $A,B,C$ and $D$. The road is in a complete circular form but having several approach roads leading to the centre. Exactly in the centre of the ring road there is a tree which is $20km$ from point $A$ on the circular road. You have taken a round of the circular road starting from point $A$ and finish at the same point after touching points $B,C$ and $D$. You then drive $20km$ interior towards the tree from point $A$ and from there reach somewhere in between $B$ and $C$ on the ring road. How much distance you have to travel from the tree to reach the point between $B$ and $C$ on the ring road?

Q. There is a ring road connecting points A, B, C and D The road is in a complete circular form but having several approach roads leading to the centre Exactly in the centre of the ring road there is a tree which is 20 km from point A on the circular road You have taken a round of the circular road starting from point A and finish at the same point after touching points B, C and D You then drive 20 km interior towards the tree from point A and from there reach somewhere in between B and C on the ring road How much distance you have to travel from the tree to reach the point between B and C on the ring road ?

Q.
On one side of a road of width $d$ metres there is a point of observation $P$ at a height $h$ metres from the ground. If a tree on the other side of the road, makes a right angle at $P$, height of the tree in metres is: