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One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, then the slower pipe alone will be able to fill the tank in :

A.
81 min
B.
108 min
C.
144 min
D.
192 min
উত্তর : C.
144 min

শেয়ার :

সম্পর্কিত প্রশ্ন সমূহ

A person’s present age is two-fifth of the age of his mother. After 8 years , he will be one-half of the age of his mother . How old is the mother at present ?

A.
32 years
B.
36 years
C.
40 years
D.
48 years
Show Answer

If 25% of a number is subtracted from a second number, the second number reduces to its five-sixth .What is the ratio of the first number to the second number ?

A.
Sat Dec 30 1899 01:03:00 GMT+0000 (Coordinated Universal Time)
B.
Sat Dec 30 1899 02:03:00 GMT+0000 (Coordinated Universal Time)
C.
Sat Dec 30 1899 03:02:00 GMT+0000 (Coordinated Universal Time)
D.
None of these
Show Answer

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
Show Answer

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
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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
Show Answer

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
Show Answer

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
Show Answer

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
Show Answer

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
Show Answer

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
Show Answer