Subject
Quantitative Aptitude
Topic
Time and Work
5 men and 2 boys working together can do four times as much work as a man and a boy.Working capacities of a man and a boy are in the ratio:
5 men and 2 boys working together can do four times as much work as a man and a boy.Working capacities of a man and a boy are in the ratio:
ক)
1:2খ)
2:1গ)
1:3ঘ)
3:1Explanation
(প্রশ্ন-১ জন লোক ও ১ জন বালক একত্রে যে পরিমান কাজ করে ,ঐ একই সময়ে ৫ জন লোক ও ২ জন বালক তার ৪ গুন কাজ করে।একজন লোক ও একজন বালক এর কর্মদক্ষতার অনুপাত কত?) ধরি,একটি নির্দিষ্ট সময়ে একজন লোক করে x অংশ একজন বালক করে y অংশ অতএব ১ জন লোক ও ১ জন বালক একত্রে কাজ করে =(x+y) অংশ অতএব 5x+2y=4(x+y) বা,5x+2y=4x+4y বা, x=2y বা,x/y=2/1 অতএব x:y=2:1Related questions
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