Question
A boat can travel 16 km more in downstream than that in
upstream, in 8 hours while the difference between the time taken by the same boat to travel 180 km and 120 km, in still water, is 4 hours. Find the approximate time taken by the boat to travel 200 km in downstream and 100 km in upstream.Solution
Let the speed of boat in still water and speed of stream be 'x' km/hr and 'y' km/hr, respectively. According to question; (180/x) - (120/x) = 4 Or, (60/x) = 4 So, x = 15 Now, 8 X (15 + y) = 8 X (15 - y) + 16 Or, 120 + 8y = 120 - 8y + 16 Or, 16y = 16 So, y = 1 So, downstream speed of the boat = (15 + 1) = 16 km/hr And, upstream speed of the boat = (15 - 1) = 14 km/hr Required time taken = (200/16) + (100/14) ~ (13 + 7) ~ 20 hours
Which of the following global e-commerce company becomes world's first listed firm to lose $1 trillion in market cap?
In which type of tax is the marginal tax rate higher than the average tax rate?
India's wholesale price index (WPI)-based inflation in July came in at_________, significantly higher than (-)4.12 percent reported in June on account o...
For grant of Miniratna Category-I status to Central Public Sector Enterprises (CPSEs), the CPSEs have made profit in the last ______ years continuously.
Within the AD-AS model, a phenomenon known as stagflation is best represented by a shift in which curve, and with what consequence for the short-run equ...
Which of the following bank renamed and nationalised as the State Bank of India in 1955?
What does the abbreviation "SIP" stand for in mutual funds?
What is the primary focus of the Priority Sector Lending (PSL) guidelines in India?
What is the minimum capital adequacy ratio required for Indian banks under the Basel III norms?
Canara Bank was nationalized in which of the following year?
Relevant for Exams:
