Question
Downstream speed of a boat is (8/7)th of the speed of
the boat in still water. Find the time taken by the boat to cover 280 km downstream if it covers 210 km upstream in 7 hours.Solution
ATQ, Let the downstream speed of the boat and speed of the boat in still water be 8x km/hr and 7x km/hr, respectively. Therefore, speed of the stream = downstream speed - speed of the boat in still water Speed of stream Speed of stream = 8x−7x = x km/hr And, upstream speed of the boat = speed of the boat in still water - speed of stream Upstream speed Upstream speed=7x − x = 6x km/hr Given: 
So, downstream speed of the boat: 8x = 8×5 = 40km/hr Required time: 
Select the most appropriate option to fill in the blank.
The government should take steps to ______ pollution.
The special campaign featuring the ferocious, talking dinosaur has been ___________ by the United Nations Development Programme to urge more climate act...
While hiking the mountains of Nepal, a British Hiker irked a tea seller by bargaining for what she thought was steeply priced tea. At 150 Nepalese Rupee...
Choose the appropriate answer.
The statue, which was declared as a new ___________ of an antique, was recovered hours before it was scheduled to be shipped to Malaysia.
Just a wall separates it from Mangalavanam, forested with mangroves and tall trees, home to migratory birds which ___________ Kochi from afar.
In each of the questions below, a sentence is given with two blanks, indicating that some parts are missing. Identify the correct pair of words that fit...
- The following sentences contains a blank. Choose the most appropriate word or phrase from the given options to complete the sentence grammatically and cont...
It’s important to _______ when negotiating a contract.
- The given question has one blank indicating that something has been omitted. Choose the word for the given options that could fit in the blank correctly. <...
