IMO Level 1- Mathematics Olympiad (SOF) Class 10: Questions 873 - 879 of 968
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Question 873
Question
MCQ▾The angle of elevation of a cloud from a point above a lake is and the angle of depression of its image in lake is The height of the cloud is________.
Choices
Choice (4) | Response | |
---|---|---|
a. | 40m | |
b. | 100m | |
c. | 50m | |
d. | 80m |
Question 874
Question
MCQ▾The angle of elevation of a cloud from a point above a lake is and the angle of depression of its image in lake is The height of the cloud is________.
Choices
Choice (4) | Response | |
---|---|---|
a. | 50m | |
b. | 40m | |
c. | 70m | |
d. | 80m |
Question 875
Question
MCQ▾The angle of elevation of a cloud from a point h meters above a lake is . The angle of depression of its reflection in the lake is The height of the cloud is________.
Choices
Choice (4) | Response | |
---|---|---|
a. | hcot (60°- θ) | |
b. | hcot (60° + θ) | |
c. | htan (60°-θ) | |
d. |
Question 876
Question
MCQ▾The length of a string between a kite and a point on the ground is . If the string makes an angle with level ground such that how high is the kite?
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | 76.96m | |
c. | ||
d. | 44.96m |
Question 877
Question
MCQ▾If and , then ________.
Choices
Choice (4) | Response | |
---|---|---|
a. | - 1 | |
b. | 1 | |
c. | 0 | |
d. | 2 |
Question 878
Question
MCQ▾If and , then ________.
Choices
Choice (4) | Response | |
---|---|---|
a. | - 1 | |
b. | 2 | |
c. | 1 | |
d. | 0 |
Question 879
Question
MCQ▾An observer tall is away from a chimney. The angle of elevation of he top of the chimney from her eyes is the height of the chimney is________.
Choices
Choice (4) | Response | |
---|---|---|
a. | 0.52 | |
b. | 2.5 | |
c. | 1.45 | |
d. | 9.86 |