Advertisements
Advertisements
प्रश्न
Two trains, one from Howrah to Patna and other from Patna to Howrah start simultaneously. After they meet, the trains reach their destinations after 9 hours and 16 hours respectively. The ratio of their speed is.
विकल्प
2 : 03
4 : 03
6 : 07
9 : 06
Advertisements
उत्तर
4: 03
Explanation:
When train reach after they met in t1 and t2 hr
`("Speed of train I")/("Speed of train II")=sqrt("t"_1/"t"_2)=sqrt(16/9)=4:3`
APPEARS IN
संबंधित प्रश्न
A train 600 meters long is running at a speed of 90 kms/hr. If it crosses a tunnel in one minute, then the length of the tunnel is:
Azhar can row 9.333 kmph in still waters and finds that it takes him thrice as much time to row up than as to row down the same distance in the river. The speed of the current of the river is
A train travels with a speed of 20 m/s in the first 10 minutes, goes 8.5 kms in the next 10 minutes, 11 kms in the next 10 minutes, 8.5 kms in the next 10 and 6 kms in the next 10 minutes. What is the average speed of the train in kilometer per hour for the journey described?
An express train travels at an average speed of 120 km per hour, stopping for 4 minutes after every 80 kms. How long will it take the train to reach a destination 960 km away?
A train 300 meters long is running at a speed of 25 meters per second, it will cross a bridge 200 meters long in
In a race of 200 m run, A beats S by 20 m and N by 40 m. If S and N are running a race of 100 m with exactly same speed as before, then by how many metres will S beat N?
Neeraj is going to Agra on his bike from Delhi. He overtakes a bus traveling from Delhi to Agra at 4.30 pm. Neeraj reaches Agra at 6 pm. After stopping there for an hour, he starts back towards Delhi and meets the same bus at 7.30 pm which was moving towards Agra at that time. If both the bus and the bike were traveling with uniform speeds on the same route, at what time would the bus reach Agra?
In covering a distance of 30 km, Abhay takes 2 h more than Sameer. If Abhay doubles his speed, then he would take 1 h less than Sameer. Abhay's speed is
A train passes a 110 m long platform in 40 s and a boy standing on the platform in 30 s. The length of the train is
The ratio of speed of the boat to that of the current is 7 : 3. If the boat goes downstream in 6 hrs 20 minutes, then it will return in
