Question
‘X’ and ‘Y’ together can complete a task in 18
hours. If ‘Y’ alone takes 45 hours to complete the same task, how long will ‘X’ take to do it alone?Solution
ATQ,
Let the total work = 90 units {LCM (18 and 45)}
Efficiency of ‘X’ and ‘Y’ together = (90/18) = 5 units/hour
Efficiency of ‘Y’ alone = (90/45) = 2 units/hour
Efficiency of ‘X’ alone = (5 – 2) = 3 units/hour
Time taken by ‘X’ to finish the work alone = (90/3) hours = (90/3) × 60 = 1800 minutes
The scientist's groundbreaking research could ______ the way we understand climate change and its effects on the environment.
The large-scale __________of troops by the Syrian government and its allies around the province, has led to speculation about an____________attack as we...
Corals are colonial animals that resemble humans in one respect: they’re great engineers. Corals construct reefs by excreting calcium carbonate. H...
Drink ____ of liquids ____ the day even if you don’t feel thirsty.
Our education system needs a better __________ system for the students.
(A) estimation (B) opinion �...
The continuous cycling of water among _______ three forms _________ the total amount of water on the earth constant even when the whole world is using it.
Sitaram Swain, winner of the Emerging Artist of the year Award 2017, tells us how common objects …….him to deal ….. bigger issues.
Instead of addressing the issue directly, he tried to _______ and avoid the difficult conversation.
The marathon runner's determination and rigorous training regimen allowed him to ___________ his own record, setting a new standard of excellence in the...
The startup is growing quickly, but they need to ensure they don’t _______ and make careless mistakes.
