Question
A train covers a distance of 72 km at the speed of 48
km/h the next 69 km distance covers with a speed of 46 km/h and last 54 km with the speed of 72 km/h find the average speed of the train?Solution
Since the train covers different distance with different speeds. So, Average speed = Total Distance/Total Time Total distance = 72 + 69 + 54 = 195 km Time1 = 72/48, Time2 = 69/46 & Time3 = 54/72 Total Time = 72/48 + 69/46 + 54/72 Therefore, Average Speed = 195/(72/48 + 69/46 + 54/72) = 52 km/hr
In a village 40% of votes were cast in an election. A and B were the contestants. A won by 600 votes. If B had got 60% more votes, there would have been...
A number is increased by 20% and then decreased by 25%. Find the net change %.
A number is initially increased by 24% and subsequently reduced by 30%. Determine the overall percentage change in the number, indicating whether it is ...
Simran scored 25% marks in a test and failed by 50 marks, whereas Neil scored 40% marks in the same test and failed by 20 marks. Find the passing marks ...
Write 95 out of 200 as a percentage.
In a train, 45% of the passengers are females. Out of total number of passengers, 65% have unreserved tickets out of which 36% are females. How much per...
The average age of three children in a family is 35% of the average of the age of father and the eldest child. The total age of the mother and the young...
If 97% of students are present in a class and 12 students are absent. Find total numbers of student in class?
- The population of a city grows by 12% annually. If the population after 2 years will be 31,360, what is the present population?
Ramesh's salary was reduced by 10% and then the reduced salary was increased by 10%. What was his ultimate loss?
Relevant for Exams:
