Mathematics
A flagpole is erected at the top of a building. The angle of elevation of the top and foot of the flagpole from a point 100 m away, on the same level as that of the foot of the building, are 33° and 31° respectively. Find the height of the flagpole. Give your answer correct to the nearest metre.
Related Questions
Find the mean of the following frequency distribution using step-deviation method.
Take assumed mean = 28
Class interval Frequency 0 - 8 10 8 - 16 20 16 - 24 14 24 - 32 16 32 - 40 18 40 - 48 22 Using a graph paper, draw an ogive for the following distribution which shows a record of weight in kilograms of 100 students.
Weight (in kg) Number of students 35 – 40 4 40 – 45 6 45 – 50 10 50 – 55 24 55 – 60 26 60 – 65 17 65 – 70 8 70 – 75 5 Use your ogive to estimate the following:
(a) the median weight of the students.
(b) percentage of students whose weight is 60 kg or more.
(c) the weight above which 20% of the students lie.
Rohit and Vinay both opened a recurring deposit account in a bank for 2 years at 8% simple interest. Vinay deposited ₹ 300 per month. On maturity, Rohit’s interest was ₹ 800 more than Vinay’s interest. Find:
(a) interest earned by Vinay.
(b) sum deposited by Rohit every month.