Subject
Bank Exam
Topic
Bangladesh Bank AD 2011
A train which travels at a uniform speed due to some mechanical fault after travelling for an hour goes at 3/5 th of the orginal speed and reached the destination 2 hours late. If the fault had occurred after travelling another 50 miles, the train would have reached 40 minutes earlier. What is the distance between the two stations?
A train which travels at a uniform speed due to some mechanical fault after travelling for an hour goes at 3/5 th of the orginal speed and reached the destination 2 hours late. If the fault had occurred after travelling another 50 miles, the train would have reached 40 minutes earlier. What is the distance between the two stations?
ক)
280খ)
200গ)
310ঘ)
320Explanation
Let the normal speed be s, the normal time be t and the distance be d. s is in miles/hour. t in hours. d in miles. Then d=st --------------------------------------... Now suppose the train travels at s for an hour, and then completes the rest of the journey at (3s/5). Distance travelled in the first hour = s*1=s Distance remaining = d-s Time to cover remaining distance = (d-s)/ (3s/5) Total time = (d-s)/ (3s/5) +1 We are told the train is 2h late, so total time = t + 2 Therefore: 1+ (d-s)/(3s/5)=t+2 (d-s)/(3s/5)=t+1 (5d-5s)/3s=t+1 5d-5s=3st+3s 5d=3st+8s --------------------------------------... Now suppose the train travels for an hour at speed s, covering a distance s. The train then travels a further 50 miles at speed s. Total distance before fault = (s+50) Time taken to travRelated questions
Mr. A is 5 years senior to Mr. B, Mr. B is 3 years senior to Mr. C, and Mr. C is 2 years junior to Mr. D in job experience. If Mr. D has 15 years job experience, how many experience does Mr. A possess?UNIX is a:A cube has a volume of 8m3. If each side is doubled in length, what will be its new volume?Bluetooth is the popular name for the………… wireless networking standard.A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than C. Working together, they can do it in:What is the slope of the line that contains the points (1,3)and (4, -3)?What is the size of Annual Development Program for Bangladesh for FY 2011-12? (Answer missing)The price of corn rose 20% two years ago and 15% last year. What is the combined persent increase in price?