Subject
Bank Exam
Topic
Dhaka Bank Ltd. 2016 Trainee Officer (Cash)
Bony takes 2 hours to wash 500 dishes, and Farah takes 3 hours to wash 450 dishes. How long will they take working together to wash 1000 dishes?
Bony takes 2 hours to wash 500 dishes, and Farah takes 3 hours to wash 450 dishes. How long will they take working together to wash 1000 dishes?
ক)
1 hourখ)
2 hoursগ)
2.5 hoursঘ)
3 hoursExplanation
Ben washes 500 dishes / 2 hours = 250 dishes / 1 hour. Frank washes 450 dishes / 3 hours = 150 dishes / 1 hour. dishes that Frank washes in x hours + dishes that Ben washes in x hours = 1000 dishes 250x + 150x = 1000 400x = 1000 x = 2.5Related questions
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