Question
The speed ratio of a stream to the upstream speed of a
boat is 1:9. A boat takes 2 hours and 30 minutes to travel 82.5 km downstream. Determine the time (in minutes) the boat will take to travel 54 km in still water.Solution
Let the speed of boat in still water and speed of stream be 'v' and 'x' km/h respectively. ATQ, x:(v - x) = 1:9 Or, 9x = v - x Or, 'v' = 10x -------- (I) Downstream speed = v + x = 10x + x = '11x' km/h So, 11x = (82.5/2.5) Or, 11x = 33 So, 'x' = 3 On putting value of 'x' in equation (I) , We get, 'v' = 10 X 3 = 30 Therefore, required time = (54/30) = 1.8 hours = 1.8 X 60 = 108 minutes
Which of the following is a common type of nitrogen-fixing bacteria that forms a symbiotic relationship with leguminous plants?
The Central Warehousing Corporation was established by the Government of India in 1957. Who is the current Chairman of the organization?
The condition in which a particular gene occurs in three or more allelic forms is called
Dole processes is an example of
Which of the following is a physical change?
Chhatri is a popular variety of_______ fruit crop.
Dogridge is a salt tolerant rootstock for
Which state have highest percentage area of forest?
Fat soluble vitamins include:
Which of the following statement is/are true about herbicide resistance?
Relevant for Exams:
