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26. Three bells rings at the intervals of 36 seconds, 40 seconds and 48 seconds respectively. They start ringing together at a particular time. When they will start ringing together again?
A. After 6 minutes
B. After 12 minutes
C. After 18 minutes
D. After 24 minutes
Ans. B
27. A portion of a 30 m long tree is broken by a tornado and the top strikes the ground making an angle of 30° with the ground level. The height of the point where the tree is broken is equal to
A. 30/√3 m
B. 10 m
C. 30√3 m
D. 60 m
Ans. B
28. A cistern can be filled by a tap in 3 hours while it can be emptied by another tap in 8 hours. If both the taps are opened simultaneously, then after how much time will the cistern get filled?
A. 4.8 hr
B. 2.4 hr
C. 3.6 hr
D. 1.8 hr
Ans. A
29. A man has only 20-paise and 25-paise coins in a bag. If he has 50 coins in all totaling to Rs 11.25, then the number of 20-paise coins is
A. 28
B. 27
C. 26
D. 25
Ans. D
30. The sum of one-half, one-third and one-fourth of a number exceeds the number by 12. The number is
A. 144
B. 154
C. 90
D. 174
Ans. A