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সম্পর্কিত প্রশ্ন সমূহ
The ages of A and B are in the ratio 3:1 . Fifteen years hence , the ratio will be 2:1 . Their present ages are :
A.
30 years , 10 years
B.
45 years , 15 years
C.
21 years , 7 years
D.
60 years , 20 years
Aunik, Kamal and Jamal invested TK. 8000, TK. 4000 and TK. 8000 respectively in a business . Aunik left after six months. If after eight months, there was a gain of TK. 4005, then what will be the share of Kamal ?
A.
890
B.
1335
C.
1602
D.
1780
15 men take 21 days of 8 hours each to do a piece of work. How many days of 6 hours each would 21 women take , if 3 women do as much work as 2 men ?
A.
18
B.
20
C.
25
D.
30
A is 30% more efficient than B . How much time will they, working together , take to-complete a job which A alone could have done in 23 days ?
A.
11 days
B.
13 days
C.
21 days
D.
None of these
A person has to cover a distance of 6 km in 45 minutes. If he covers one-half of the distance in two-thirds of the total time; to cover the remaining distance in the remaining time , his speed (in km/hr ) must be :
A.
6
B.
8
C.
12
D.
15
How may seconds will a 500 meter long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train if the speed of the train is 63 km/hr ?
A.
25
B.
30
C.
40
D.
45
TK. 800 becomes TK. 956 in 3 years at a certain rate of simple interest. If the rate of interest is increased by 4%, what amount will TK. 800 become in 3 years ?
A.
1020.8
B.
1025
C.
1052
D.
None of these
The percentage increase in the area of a rectangle , if each of its sides is increased by 20%, is :
A.
0.4
B.
0.42
C.
0.44
D.
0.46
If $A + B = 2C$ and $C + D = 2A$ , then
A.
A + C = B + D
B.
A + C = 2D
C.
A + D = B + C
D.
A + C = 2B