Question
The angle of elevation of an aeroplane from a point on
the ground is 60°. After 15 seconds flight the elevation changes to 30°, if the aeroplane is flying at a height of 2400√3 m. find the speed of the aeroplane.Solution
Distance between two place in which angle change is D = n(cotθ₁ + cotθ₂) Distance = 2400√3 (cot30° + cot60°) = 2400√3 × √3 - 1/√3 = 2400√3 × 2/√3 = 4800 m So, distance covered by plane in 15 sec = 4800 m Speed of plane = 4800/15 = 320 m/sec.
In the question, assuming the given statements to be true, find which of the conclusion (s) among given two conclusions is /are definitely true and the...
Statements:
1. The city administration has implemented a complete ban on the use of private vehicles in the downtown area during peak hours. <...
Which of the following may be the code for ‘well books’?
Event (A): The authorities of Lumbini Gardens have blatantly encroached upon the footpath on 4th Main, Coffee Board Layout in Nagavara.
Event (...
Statements:
1. The demand for electric vehicles has surged in the past year.
2. The government has provided tax incentives for purcha...
In the question, assuming the given statements to be true, find which of the conclusion (s) among given two conclusions is /are definitely true and the...
Read the given statement and answer the question that follows.
Cause: Trees are being cut to build huge houses.
Statement : There are no river sand quarries employing machines and sand extraction is done manually and transportation through carts.
I. The...
In the question below, two statements (I) and (II) are given. These statements may be either independent causes, or effects of independent causes or a...
Statements:
1. Several shops in the area were closed for the day.
2. A protest march was organized in the area against a new government policy.
