৩১৯৪৩
A man takes twice as long to row a distance against the stream as to row the same distance in favor of the stream. The ratio of the speed of the boat (in still water ) and the stream is:
উত্তর
3: 1
৩১৯৪৪
A, B and C investment in a partnership in the ratio of 5: 6: 8. The ratio of their profit is 5: 3: 12. Find the ratio of time for their investment?
উত্তর
2 : 1 : 3
৩১৯৪৫
For any two numbers m, n; (m+n): (m-n): mn=7:1: 60. Find the value of 1/m: 1/n
উত্তর
3 :4
৩১৯৪৬
Three partners shared their profit in a business in the ratio 8: 7: 5. They had partnership for 7 months. 5 months and 14 months respectively. What has the ratio of theit investment?
উত্তর
64 : 49 : 20
৩১৯৪৭
Sumon bought 2 varieties of rice, costing Taka 8 per kg and Taka 12 per kg each and mixed them in some ratio. Then he sold the mixture at Taka 12 per kg, making a profit 20%. What has the ratio of mixture?
উত্তর
1 : 1
৩১৯৪৮
In a class of 60 students, 20 students like Math, 25 students like English and 30 students like Science. If 5 Students like both Math and Science, 8 Students like both English and Science and 3 students like neither of these subjects, how many students like all of the three subjects?
উত্তর
3
৩১৯৪৯
If the ratio of speed of doing work of the persons is 1: 3: 5 , what is the ratio of this taken by these people to do the same amount of work?
উত্তর
15 : 5 : 3