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15 km/hr and 20 km/hr
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STATEMENT-1 : Magnetic poles are only mathematical assumptions and have no real existence . and STATEMENT-2 : Magnetic field lines are always in closed loops .

72% of 25 students are good in mathematics. How many are not good in mathematics?

A bag contains a total of 20 books on physics and mathematics. Ten books are chosen from the bag and it is found that it contains 6 books of mathematics. Find out the probability that the remaining books in the bag contains 2 books on mathematics.

A bag contains a total of 20 books on physics and mathematics, Any possible combination of books is equally likely. Ten books are chosen from the bag and it is found that it contains 6 books of mathematics. Find out the probability that the remaining books in the bag contains 3 books on mathematics.

In a certain collage, the ratio of mathematics majors to English majors is 3:8. If in the following school year the number of mathematics majors increase 20%, and the number of English majors decrease 15%, what is the new ratio of mathematics majors to English majors?

Six papers are set in examination, two of them in mathematics: in how many different orders can the papers be given, provided only that the two mathematical papers are not successive?

in a class of 35 students , 17 have taken Mathematics , 10 have taken mathematics but not economics if each student has taken erither mathematics Of Economics or both , then the number of students who have taken Economics but not mathematics is

Rahim obtained 60 marks out of 75 in Mathematics. Find the percentage of marks obtained by Rahim in Mathematics.

There are five books on Mathematics and 6 books on Physics in a book shop. In how many ways can a student buy : (i) a Mathematics book and a Physics book (ii) either a Mathematics book or a Physics book?

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NAGEEN PRAKASHAN ENGLISH-QUADRATIC EQUATIONS-Exercise 4d
  1. A train travels a distance of 300 km at constant speed. If the spee...

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  2. A plane left 30 minutes late than its scheduled time and in order to r...

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  3. about to only mathematics

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  4. The distance by road between two towns A and B, is 216km , by rail it ...

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  5. The speed of a boat in still water is 15 km/hr. It can go 30 km ups...

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  6. The speed of a boat in still water is 9 km/hr. It can go 12 km upstrea...

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  7. about to only mathematics

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  8. A trader bought a number of articles for RS.1200. Ten were damaged and...

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  9. Mohan sold an article for RS.56 which coste him RS.x. He finds that he...

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  10. A shopkeeper purchase a certain number of books for Rs 960. If the cos...

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  11. The hotel bill for a number of persons for overnight stay is Rs 4,800 ...

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  12. In an auditorium, seats are arranged in rows was equal to the number o...

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  13. At an annual function of a school each student gives gift to every oth...

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  14. A line segment AB is 8 cm in length. AB is produced to P such that BP^...

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  15. The product of 12% of an integer and 20% of the next integer is 61.2. ...

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  16. Girl! Out of a group of swans. 7/2 times the square root of the number...

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  17. In a class test, the sum of the marks obtained by P in Mathematics ...

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  18. The angry Arjun carried some arrows for fighting with Bheeshm. With ...

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  19. A piece of cloth costs RS.75. If the piece were 4 metre longer and eac...

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  20. Everybody in a room shakes hands with everybody else. If the total num...

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