Subject
Quantitative Aptitude
Topic
Unitary Method
If it takes 4 hours to dig a hole by 50 workers, how long should it takes to dig the same hole by 30 workers ?
If it takes 4 hours to dig a hole by 50 workers, how long should it takes to dig the same hole by 30 workers ?
ক)
2 hours 24 minখ)
6 hours 12 minগ)
5 hours 12 minঘ)
6 hours 40 minExplanation
Solution: ৫ জনের লাগে = ৪ ঘন্টা । ১ জনের লাগে = ৪ ৫০ ঘন্টা । ৩০ জনের লাগে = (৫০ ৪) / ৩০ = ২০/৩ ঘন্টা । ২০ ঘন্টাকে ৩ ভাগ করলে ৩ ৬ = ১৮ ঘন্টা এবং অবশিষ্ট ২ ঘন্টা = ১২০ মিনিট যাকে ৩ দিয়ে ভাগ করলে ৪০ মিনিট হয় । সুতরাং মোট সময় লাগবে ৬ ঘন্টা ৪০ মিনিট ।Related questions
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