Question
‘P’, ‘Q’ and ‘R’ can finish a task in 12
days, 36 days and 72 days respectively. ‘P’ and ‘Q’ begin the task. After ‘n’ days, ‘P’ leaves and ‘R’ joins ‘Q’. If the total work is completed in 20 days, find the value of 2n.Solution
ATQ,
Let the total work be 72 units (LCM of 12, 36, 72) Efficiency of ‘P’ = 72 / 12 = 6 units/day Efficiency of ‘Q’ = 72 / 36 = 2 units/day Efficiency of ‘R’ = 72 / 72 = 1 unit/day ATQ, (6 + 2) × n + (2 + 1) × (20 - n) = 72 Or, 8n + 3(20 - n) = 72 Or, 8n + 60 - 3n = 72 Or, 5n = 12 Or, n = 2.4 Required value = 2 × 2.4 = 4.8
In which of the following states does the Mahatma Gandhi Setu is located?
The shape of a basketball court is a_______.
The Moderna vaccine developed against coronavirus uses which of the following vaccines technology?
In basketball, how many points are awarded when a basket is scored from outside the 6.25-metre line?
Which one of the following ornament is not worn in hands?
In the context of five year plans, Which of the following can be regarded as basic objective of planning in India?
I. A sizeable increase in the ...
What is the premium amount per annum under the Pradhan Mantri Suraksha Bima Yojana (PMSBY)?
Having opened its Twitter account in _______, the Reserve Bank of India had more than 1 million followers on its official Twitter handle by November 2020.
Who was the first exponent of 'Rolling Plan"?
Which social media platform announced to will offer a feature on its platform by the end of the year through which users will be able to discover catalo...
