Class 10th

Описание: Class 10th #ncertsolutions Ch-9 Q-6
Class 10th #ncertsolutions Ch -9 Q-5
Class 10th #ncertsolutions Ch-9, Q-2 (part -2)
Class 10th #ncertsolutions Ch-9 Q-2
Class 10th #ncertsolutions Ch-9 a contractor plans to install two slides ....
Class 10th #ncertsolutions Ch-9 A circus artist climbing a 20 m long rope...........
Class 10th #ncertsolutions Ch-9 Q-7, Q-8,Class 10th #ncertsolutions Ch-9 Q-5,Q-6Class 10th #ncertsolutions Ch-9 Q-3, Q-4
Class 10th Chapter -9 Trigonometry (Height and Distance)#ncertsolutions
EXERCISE 9.1
1. A circus artist is climbing a 20 m long rope, which is
tightly stretched and tied from the top of a vertical
pole to the ground. Find the height of the pole, if
the angle made by the rope with the ground level is
30° (see Fig. 9.11).
2. A tree breaks due to storm and the broken part
bends so that the top of the tree touches the ground
making an angle 30° with it. The distance between
the foot of the tree to the point where the top
touches the ground is 8 m. Find the height of
the tree.
3. A contractor plans to install two slides for the children to play in a park. For the children
below the age of 5 years, she prefers to have a slide whose top is at a height of 1.5 m, and
is inclined at an angle of 30° to the ground, whereas for elder children, she wants to have
a steep slide at a height of 3m, and inclined at an angle of 60° to the ground. What
should be the length of the slide in each case?
4. The angle of elevation of the top of a tower from a point on the ground, which is 30 m
away from the foot of the tower, is 30°. Find the height of the tower.
5. A kite is flying at a height of 60 m above the ground. The string attached to the kite is
temporarily tied to a point on the ground. The inclination of the string with the ground
is 60°. Find the length of the string, assuming that there is no slack in the string.
6. A 1.5 m tall boy is standing at some distance from a 30 m tall building. The angle of
elevation from his eyes to the top of the building increases from 30° to 60° as he walks
towards the building. Find the distance he walked towards the building.
7. From a point on the ground, the angles of elevation of the bottom and the top of a
transmission tower fixed at the top of a 20 m high building are 45° and 60° respectively.
Find the height of the tower.Class 10th #ncertsolutions Ch-9 Q-7, Q-8,Class 10th #ncertsolutions Ch-9 Q-5,Q-6Class 10th #ncertsolutions Ch-9 Q-3, Q-4
Class 10th Chapter -9 Trigonometry (Height and Distance)#ncertsolutions
EXERCISE 9.1
1. A circus artist is climbing a 20 m long rope, which is
tightly stretched and tied from the top of a vertical
pole to the ground. Find the height of the pole, if
the angle made by the rope with the ground level is
30° (see Fig. 9.11).
2. A tree breaks due to storm and the broken part
bends so that the top of the tree touches the ground
making an angle 30° with it. The distance between
the foot of the tree to the point where the top
touches the ground is 8 m. Find the height of
the tree.
3. A contractor plans to install two slides for the children to play in a park. For the children
below the age of 5 years, she prefers to have a slide whose top is at a height of 1.5 m, and
is inclined at an angle of 30° to the ground, whereas for elder children, she wants to have
a steep slide at a height of 3m, and inclined at an angle of 60° to the ground. What
should be the length of the slide in each case?
4. The angle of elevation of the top of a tower from a point on the ground, which is 30 m
away from the foot of the tower, is 30°. Find the height of the tower.
5. A kite is flying at a height of 60 m above the ground. The string attached to the kite is
temporarily tied to a point on the ground. The inclination of the string with the ground
is 60°. Find the length of the string, assuming that there is no slack in the string.
6. A 1.5 m tall boy is standing at some distance from a 30 m tall building. The angle of
elevation from his eyes to the top of the building increases from 30° to 60° as he walks
towards the building. Find the distance he walked towards the building.
7. From a point on the ground, the angles of elevation of the bottom and the top of a
transmission tower fixed at the top of a 20 m high building are 45° and 60° respectively.
Find the height of the tower.