Question
32 workers can complete a task in 18 days. They all
started together, but after how many days should 12 workers quit so that the task gets completed in 27 days?Solution
ATQ,
Let the efficiency of each worker be 'm' units/day Total work = 32 × 18 × m = 576m units Let after x days, 12 workers quit According to the question: 32 × m × x + 20 × m × (27 − x) = 576m → 32mx + 540m − 20mx = 576m → 12mx = 36m → x = 36 ÷ 12 = 3 So, after 3 days the 12 workers should quit.
Which of the following metals is placed at the bottom of the reactivity series?Â
Which of the following statement regarding Rutherford nuclear model is NOT correct?
The conversion of hard water into soft water by boiling or adding calcium hydroxide is called:
How many planets are terrestrial planets?
Which of the following elements is a member of the actinoid series?
_______ is a common name of ethanoic acid.
The device which transfer the signal from low resistance region to high resistance region is –
The process of gaining electrons is known as:
Vitamin necessary to prevent prolonged bleeding isÂ
Which metal remains liquid at room temperature?
