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সম্পর্কিত প্রশ্ন সমূহ
How many times in a day, are the hands of a cock in straight line but opposite in direction ?
A.
22
B.
24
C.
48
D.
20
Two numbers A and B are such that the sum of 5% of A and 4%of B is two-third of the sum of 6% of A and 8%of B. Find the ratio of A : B .
A.
1 : 1
B.
3 : 4
C.
4 : 3
D.
2 : 3
3 pumps , working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day ?
A.
10
B.
11
C.
12
D.
9
Which of the following trains is the fastest ?
A.
25m/sec
B.
1500m/min
C.
90km/hr
D.
None of these
A student was asked to find the arithmetic mean of the numbers 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14, and x. He found the mean to be 12. What should be the number in place of x ?
A.
7
B.
17
C.
31
D.
3
The interest on a certain deposit at 4.5% p.a. is TK. 202.50 in one year. How much will the additional interest in one year be on the same deposit at 5% p.a. ?
A.
22.5
B.
25
C.
20.25
D.
42.75
If 0.4 of a number is equal to 0.06 of another number, the ratio of the numbers is :
A.
3:4
B.
3:20
C.
20:3
D.
2:3
The breadth of a rectangular field is 60% of its length . If the perimeter of the field is 800 m, what is the area of the field ?
A.
37500 sq.m
B.
40000 sq.m
C.
48000 sq.m
D.
18750 sq.m