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 […]
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
Question A boat takes 6 hours to move downstream from point P to Q and to return to point P moving upstream. If the speed of the stream is 4 km/hr and speed of the boat in still water is 6 km/hr, what is the distance between point P and Q? Type multiple_choice Option 8
Question A man can row at 12 km/hr in still water. He finds that he takes twice as much time to row upstream than to row downstream when he covers a certain distance. Find the speed of the stream. Type multiple_choice Option 4 km/hr correct Option 3 km/hr incorrect Option 4.5 km/hr incorrect Option 3.5
Question A man swimming in a river which is flowing at 3 1/2 km/ hr finds that in a given time he can swim twice as far downstream as he can swim upstream. What will be his speed in still water? Type multiple_choice Option 9.5 km/hr incorrect Option 10 lm/hr incorrect Option 10.5 km/hr correct
Question A man can row a boat at a speed of 20 km/hr in still water. If the speed of the stream is 5 km/hr, in what time he can row a distance of 75 km downstream? Type multiple_choice Option 1.5 hours incorrect Option 2 hours incorrect Option 2.5 hours incorrect Option 3 hours correct
Question A boat covers 800 meters in 600 seconds against the stream and returns downstream in 5 minutes. What is the speed of the boat in still water? Type multiple_choice Option 1 m/s incorrect Option 1.5 m/s incorrect Option 2 m/s correct Option 2.5 m/s incorrect
