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A 80 m by 64 m rectangular lawn has ...

A 80 m by 64 m rectangular lawn has two roads , each 5m wide runing through its middle , one parallel to its length and the other parallel to its breadth . Find the cost of gravelling the roads at Rs. 40 per `m^(2).`

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The correct Answer is:
Rs. 27800
Area of walls `={(80xx5)+(64xx5)-(5xx5)}m^(2)=695m^(2)`.
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RS AGGARWAL-PERIMETER AND AREA OF PLANE FIGURES -Exercise 15B
  1. A room 4.9 m long and 3.5 m broad is covered with carpet leaving an un...

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  2. In the centre of a rectangular lawn of dimensioms 50 mxx40 m a rectang...

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  3. A 80 m by 64 m rectangular lawn has two roads , each 5m wide ru...

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  4. The dimensions of a room are 14mxx10mxx6.5m. there are two doors ...

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  5. The cost of painting if four walls of a room 12 m long at Rs. 30 ...

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  6. Find the area and perimeter of a square plot of land whose diagona...

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  7. Find the length of the diagonal of a square whose area is 128 c...

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  8. The area of a square field is 8 hectares , How long would a man ta...

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  9. The cost if a harvesting a square field at Rs. 900 per hectare is ...

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  10. The cost of fencing a square lawn at Rs.14 per metre is Rs. 28000. Fin...

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  11. In the given figure ABCD is a quadrilateral in which diagonal ...

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  12. Find the area of the quadrilateral ABCD in which AD = 24 cm angle ...

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  13. Find the perimeter and area of the quadrilateral ABCD in which AB...

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  14. Find the area of the quadrilateral ABCD in which AB= 42 cm. Bc=21 ...

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  15. Find the area of a parallelogram with base equal to 25 cm and th...

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  16. The adjacent sides of a parallelogram are 32 cm and 24 cm . If th...

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  17. The area of a parallelogram is 392 m^(2) . If its altitude is t...

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  18. The adjacent sides of a parallelogram ABCD measure 34 cm and 20 ...

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  19. Find the area of the rhombus , the lengths of whose diagonals are...

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  20. the perimeter of a rhombus is 60 cm.If one of its digonals is 18...

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