Subject
Quantitative Aptitude
Topic
Unitary Method
John appointed 25 persons to complete a small bridge in 40 days. After 20 days he appointed 15 more workers and the bridge was completed 5 days earlier. If he had not appointed additional workers by how many days he would have been behind the scheduled time ?
John appointed 25 persons to complete a small bridge in 40 days. After 20 days he appointed 15 more workers and the bridge was completed 5 days earlier. If he had not appointed additional workers by how many days he would have been behind the scheduled time ?
ক)
5খ)
7গ)
6ঘ)
4Explanation
Solution: ধরি, কাজটি শেষ করতে মোট সময় লাগবে ক দিন । তাহলে ২৫ জনকে মোট লাগবে = ২৫ক দিন । প্রশ্নমতে, ২৫ ক = (২০ ২৫) + (১৫ ৪০) = ( ২৫ জন ২০ দিনে কাজ করার পর ২৫+১৫ = ৪০ জন করেছে ১৫ দিন, কারণ মোটদিন ৪০ - ৫ = ৩৫) বা, ২৫ক = ১১০০ সুতরাং ক = ৪৪ দিন । অতিরিক্ত লোক লাগানো না হলে সময় বেশি লাগতো ঃ ৪৪ - ৪০ = ৪ দিন ।Related questions
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