Question
‘Amit’ is 1.5 times as efficient as ‘Bhuvan’, who
is 1/3 as efficient as ‘Chirag’. If Amit and Chirag together complete a work in 18 days, how long will Bhuvan and Dev take to do it if their efficiency ratio is 2:1 respectively?Solution
ATQ,
Let efficiency of Chirag = 3x units/day
Efficiency of Bhuvan = 3x / 3 = x units/day
Efficiency of Amit = 1.5x units/day
Efficiency of Dev = (x / 2) × 1 = 0.5x units/day
Total work = (Amit + Chirag) × 18 = (1.5x + 3x) × 18 = 81x units
Combined efficiency of Bhuvan and Dev = x + 0.5x = 1.5x units/day
Time = 81x / 1.5x = 54 days
- Anita spends 18% of her monthly income on rent and 70% of the rest on household expenditure. If she saves Rs. 1,890, then find her monthly income.
40 Litres of water is added to 60 litres of a solution containing 40% alcohol . What is the concentration of alcohol in solution now?
In a colony, there are 30 APL families and 36 BPL families. Each APL and BPL family got blankets equal to 25% and 75%, respectively of total number of f...
Monthly savings of ‘A’ is Rs. 1500 more than his monthly expenditure and his total monthly income is Rs. 4100. If his monthly income is increased by...
Monthly savings of ‘A’ is Rs. 1600 more than his monthly expenditure and his total monthly income is Rs. 4800. If his monthly income is increased by...
- Sarla had Rs. 8000 in total. She spent x% of this amount on food. After that, she spent (x + 20)% of the remaining money on rent. Additionally, she spent R...
What is 15% of 34?
In a small town, 50% of the people like fishing, 70% like hiking, and 30% like both. If the remaining 21 people don't like either activity, how many peo...
Two students appeared in an exam and one secured 10 marks more than the other. If marks of student who got more marks is 52% of the sum of the marks of ...
Sara has 150 kg of oranges (rotten and fresh). She sold 50% of the total oranges such that out of the remaining oranges, 30% are rotten. Find the percen...
Relevant for Exams:
