Question The angle of elevation of the sun when the length of the shadow of a pole is equal to the height of the pole is? Type multiple_choice Option 45° correct Option 30° incorrect Option 60° incorrect Option 90° incorrect Solution Let ∠BAC = θ Let height of pole is h and length of the […]
Question The tops of two poles are connected by a wire. The heights of the poles are 10 m and 14 m respectively. If the wire makes a 30° angle with the horizontal, find the length of the wire? Type multiple_choice Option 7 m incorrect Option 7.5m incorrect Option 8m correct Option 8.5m incorrect Solution
Question The angle of elevation of the top of a tower at a point X is 30°. On walking 30 m towards the tower if the angle of elevation becomes 60° at point Y, find the height of the tower? Type multiple_choice Option 26 m correct Option 28 m incorrect Option 29 m incorrect Option
Question A man 1.5 meter tall is 30√3 meter away from a building. When he sees the top of building the angle of elevation is 30°. Find the height of the building? Type multiple_choice Option 31.5m correct Option 30 m incorrect Option 53.4m incorrect Option 48 m incorrect Solution: Let AD be the man and
Question A ladder is leaning against a wall. It makes a 60° angle with the wall. If the distance between foot of ladder and wall is 5.5 meters, find the length of the ladder. Type multiple_choice Option 9.5m incorrect Option 10m incorrect Option 10.5m incorrect Option 11m correct Solution Let BC be the wall and
Q. In a single lane road, traffic volume of 1000 vehicle/h moving at 20 km/h, comes to a halt due to an accident. If jam density is 150 vehicle/km, the velocity of the shock wave generated (in absolute value) is_____________km/h. Ans: 100 Solution: Shock waves that occur in traffic flow are very similar to the
Question Two ships are sailing in the sea on the two sides of a lighthouse. The angles of elevation of the top of the lighthouse observed from the ships are 30° and 45° respectively. If the lighthouse is 100m high, find the distance between the two ships. Type multiple_choice Option 155.80 m incorrect Option 157.80
Question The speed of a boat in still water is 5km/hr. If the speed of the boat against the stream is 3 km/hr, what is the speed of the stream? Type multiple_choice Option 1.5 km/hr incorrect Option 2 km/hr correct Option 2.5 km/hr incorrect Option 1 km/hr incorrect Solution Let the speed of stream =
Question A motorboat travels 16 km in 2 hours against the flow of river and travels next 8 km along the flow of the river in 20 minutes. How long will it take motorboat to travel 48 km in still water? Type multiple_choice Option 2.5 hours incorrect Option 3 hours correct Option 3.5 hours incorrect
Question A man can swim in still water at 8 km/hr. If the river is flowing at 2km/hr he takes 80 minutes to reach a place and return back, how far is the place? Type multiple_choice Option 4 km incorrect Option 3 km incorrect Option 4.5 km incorrect Option 5 km correct Solution : Let
