গাণিতিক যুক্তি
মোট ১৯৫৮২ টি প্রশ্ন · উত্তর ও ব্যাখ্যাসহ · বিনামূল্যে
১৭০৮১–১৭১০০ দেখানো হচ্ছে, মোট ১৯৫৮২ টির মধ্যে
- A motorboat can travel at 5 km/hr in still water. It travelled 45 km downstream in a river and then returned, taking altogether 50 hours. Find the rate of flow of the river. MCQ
- A boatman can row 2.5 km against the stream in 25 minutes and return in 12.5 minutes. Find the rate of flow of the current. MCQ
- A train 300 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 300 m long? MCQ
- A man can row 30 km upstream in 6 hours. If the speed of the man in still water is 6 km/hr, find how much he can row downstream in 10 hours. MCQ
- Two trains are moving in opposite directions at (50/3) m/s and 25 m/s. Their lengths are 1100 m and 900 m respectively. The time taken by the slower train to cross the faster train is: MCQ
- A boat can travel with a speed of 12 km/hr in still water. If the speed of the stream is 5 km/hr, find the time taken by the boat to go 136 km downstream. MCQ
- Mr. Rabbani running at 150 m/min alongside a railway track in 250 meters ahead of the engine of a 120 meters long train running at 750 m/min in the same direction. In how much time will the train pass him? MCQ
- A man's speed with the current is 18 km/hr and the speed of the current is 3.6 km/hr. The man's speed against the current is: MCQ
- A 230 meters long train running at the speed of 80 km/hr crosses another train running in opposite direction at the speed of 120 km/hr in 9 seconds. What is the length of the other train? MCQ
- A boat running upstream takes 4 hours 24 minutes to cover a certain distance, while it takes 2 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively? MCQ
- A train runs at the speed of 72 km/hr and crosses a 320 m long platform in 30 seconds. What is the length of the train? MCQ
- A motorboat, whose speed in 250 m/min in still water goes 30000 m downstream and comes back in a total of 270 minutes. The speed of the stream is: MCQ
- Two trains, each 50 m long, moving in opposite directions, cross each other in 4 seconds. If one is moving twice as fast the other, then the speed of the faster train is: MCQ
- A boat running downstream covers a distance of 24 km in 3 hours while for covering the same distance upstream, it takes 6 hours. What is the speed of the boat in still water? MCQ
- Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time which they take to cross each other, is: MCQ
- The speed of a boat in still water in 20 km/hr and the rate of current is 4 km/hr. The distance travelled downstream in 20 minutes is: MCQ
- A train travelling at a speed of 75 mph enters a tunnel 3.5 miles long. The train is 0.25 mile long. How long does it take for the train to pass through the tunnel from the moment the front enters to the moment the rear emerges? MCQ
- Shipon leaves his home and walks at a speed of 12 km per hour, reaching the railway station 10 minutes after train had departed. If instead he had walked at a speed of 15 km per hour, he would have reached the station 10 minutes before the train’s departure. The distance (in km) from his home to the railway station is - MCQ
- Find the angle of elevation of the sun when the shadow of a pole of 18 m height is 6√3 long. MCQ
- A pump can fill a tank with water in 2 hours. Because of a leak, it took 7/3 hours to fill the tank. The leak can drain all the water from the tank in: MCQ