Question

22. Find the mode of the following frequency distribution: Marks 10-20 20-30 30-40 40-50 50-60 Number of students 15 30 45 12 18 SECTION - D Questions 23 to 30 carry 4 marks each. 23. An aeroplane at an altitude of 300 m observes the angles of depression of opposite points on the two banks of a river to be 45º and 60°. Find the width of the river. OR A man on the top of a vertical observation tower observes a car moving at a uniform speed coming directly towards it. If it takes 12 minutes for the angle of depression to change from 30° to 45°, how long will the car take to reach the observation tower from this point?

          22. Find the mode of the following frequency distribution:
Marks
10-20 20-30 30-40 40-50 50-60
Number of students
15
30
45
12
18
SECTION - D
Questions 23 to 30 carry 4 marks each.
23. An aeroplane at an altitude of 300 m observes the angles of depression of opposite points on the
two banks of a river to be 45º and 60°. Find the width of the river.
OR
A man on the top of a vertical observation tower observes a car moving at a uniform speed
coming directly towards it. If it takes 12 minutes for the angle of depression to change from 30°
to 45°, how long will the car take to reach the observation tower from this point?

22. Find the mode of the following frequency distribution:
Marks
10-20 20-30 30-40 40-50 50-60
Number of students
15
30
45
12
18
SECTION - D
Questions 23 to 30 carry 4 marks each.
23. An aeroplane at an altitude of 300 m observes the angles of depression of opposite points on the
two banks of a river to be 45º and 60°. Find the width of the river.
OR
A man on the top of a vertical observation tower observes a car moving at a uniform speed
coming directly towards it. If it takes 12 minutes for the angle of depression to change from 30°
to 45°, how long will the car take to reach the observation tower from this point?

Added by Monica B.

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