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5 pencils and 7 pens together cost Rs.50...

5 pencils and 7 pens together cost Rs.50 whereas 7 pencils and 5 pens together cost rs.46 Find the cost of one pencil and that of one pen.

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The correct Answer is:
Cost of pencil =Rs.3: Cost of pen = Rs.5
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NCERT TAMIL-PAIR OF LINEAR EQUATIONS IN TWO VARIABLES -EXERCISE-4.1
  1. By comparing the ratios aunderset1/aunderset2, bunderset1/bunderset2, ...

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  2. By comparing the ratios aunderset1/aunderset2, bunderset1/bunderset2, ...

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  3. By comparing the ratios aunderset1/aunderset2, bunderset1/bunderset2, ...

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  4. Check whether the following equations are consistent or inconsistent. ...

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  5. Check whether the following equations are consistent or inconsistent. ...

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  6. Check whether the following equations are consistent or inconsistent. ...

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  7. Check whether the following equations are consistent or inconsistent. ...

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  8. Check whether the following equations are consistent or inconsistent. ...

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  9. Check whether the following equations are consistent or inconsistent. ...

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  10. Solve following pair of equations by using the substitution method ...

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  11. Check whether the following equations are consistent or inconsistent. ...

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  12. Check whether the following equations are consistent or inconsistent. ...

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  13. Neha went to a 'sale' to purchase some pants and skirts. When her frie...

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  14. 10 students of class-X took part in a mathematics quiz. If the number ...

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  15. 5 pencils and 7 pens together cost Rs.50 whereas 7 pencils and 5 pens ...

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  16. Half the perimeter of a rectanguler garden id 36m. If the length is 4m...

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  17. Hema’s age is 4 times the age of Mary. Write a linear equation in two ...

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  18. The area of a rectangle gets reduced by 8 sq units if its length is re...

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  19. IN a class, if three stdents sit on each bench, one student will be le...

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