Question
A boat takes 20 hours to cover 'n' km in still water.
While traveling downstream, it takes 15 hours to cover (n - 50) km. If the speed of the boat in still water is 5 times the speed of the stream, find the speed of the stream.Solution
ATQ, Let the speed of the stream be 'y' km/h So, speed of the boat in still water = 5 Ć y = '4y' km/h ATQ; (n/5y) = 20 Or, n = '100y' ...... (I) Downstream speed of the boat = 5y + y = '6y' km/h ATQ; {(n - 50) /6y} = 15 Or, n - 50 = 90y ..... (II) From equations (I) and (II): So, 100y - 50 = 90y Or, 10y = 50 So, y = 5 So, speed of the stream = 5 km/h
Which statements are correct about the Gupta Empire?
1. Samudragupta is called the 'Napoleon of India'.
2. The Gupta period is known as th...
Who wrote the novel āLife of Piā?
At the 66th National Film Awards, 2019, which state wins the Most Film Friendly State?
Which of the following protocols is used to receive email?
The new road being built in Eastern ladakh passing through villages of Darbuk and Shyok at southern Shyok Valley connects to which of the following airs...
Citigroup Inc has planned to sell their Indian consumer businesses to the private lender ____ forĀ $1.6 billion.
Which country has appointed Olympic Gold medalist Neeraj Chopra as the āFriendship Ambassadorā?
NBFCs were the largest net borrowers of funds from the financial system, which of the following was second highest net borrowers of funds from the finan...
Kathakali, one of the classical dances of India, is predominantly performed in which of the following states of India?
Relevant for Exams:
