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Question 1
The average weight of the students in a class is 53 kg. four new students are admitted to the class whose weights are 52 kg, 46.5 kg, 49 kg and 52.5 kg respectively. Now, the average weight of the students of the class is 52.5 kg. the number of students in the beginning was
Question 2
A man rows down a river 18 km in 4 hours with the stream and returns in 10 hours. Consider the following statements:
1) The speed of the man against the stream is 1.8 km/hr.
2) The speed of the man in still water is 3.15 km/hr.
3) The speed of the stream is 1.35 km/hr.
Which of the above statements are correct?
1) The speed of the man against the stream is 1.8 km/hr.
2) The speed of the man in still water is 3.15 km/hr.
3) The speed of the stream is 1.35 km/hr.
Which of the above statements are correct?
Question 3
The speed of boat in still water is 10 km / hr. if it can travel 26 km downstream and 14 km upstream in the same time, the speed of the stream is:
Question 4
A mason can build a tank in 18 h. after working for 6h, he took the help of a boy and finished the work in another 5h. the time that the boy will take alone to complete the wirk is
Question 5
Ratio of present age of A and B is 5:4 . After 15 years ratio of their ages will become 7:6 . Find the present age of A .
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Oct 27CDS & Defence
