Subject
Quantitative Aptitude
Topic
Pipes & Cistern
Faruk can complete a job in 12 hours and jamal can complete the same job in 8 hours. Faruk starts the job at 9 a.m and stops working at 3 p.m. If jamal starts working at 4 p.m to complete the job, at what time is the job finished ?
Faruk can complete a job in 12 hours and jamal can complete the same job in 8 hours. Faruk starts the job at 9 a.m and stops working at 3 p.m. If jamal starts working at 4 p.m to complete the job, at what time is the job finished ?
ক)
6 p.mখ)
7 p.mগ)
8 p.mঘ)
10 p.mExplanation
Solution: এখানে ফারুক কাজ করেছে সকাল ৯টা থেকে বিকাল ৩টা অর্থাৎ ৬ ঘন্টা । ফারুক ১২ ঘন্টায় সম্পূর্ণ কাজ শেষ করতে পারে, তাই ৬ ঘন্টায় করতে পারবে অর্ধেক কাজ । আবার জামাল সম্পূর্ণ কাজটি শেষ করতে পারে ৮ ঘন্টায়, যেহেতু জামাল কাজটির অর্ধেক কাজ করা শুরু করেছে বিকাল ৪টায় তাই তার সময় লাগবে ৪ ঘন্টা । তাহলে কাজটি শেষ হবে ৪+৪ = সন্ধ্যা ৮ টায় ।Related questions
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