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The length of the diagonal of a square is 20cm. Its area is `(a)400 c m^2` (b) `200 c m^2` `(c)300 c m^2` (d) `100sqrt(2)\ c m^2`

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RD SHARMA ENGLISH-MENSURATION-All Questions
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  2. The area of a square of side 14cm is (a)49 c m^2 (b) 156 c m^2 ...

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  3. The length of the diagonal of a square is 20cm. Its area is (a)400 c...

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  4. The length and breadth of a rectangle of area A are doubled. The area ...

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  6. The perimeter of a square whose area is 225\ m^2 is: (a) 15m (b) 60m...

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  7. The area of a rectangle is 650 c m^2 and its breadth is 13cm. The peri...

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  8. How many envelops can be made out of a sheet of paper 72cm by 48cm, ...

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  9. If the diagonal of a square is sqrt(8)\ metre, then its area is: (a)...

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  11. The area of a rectangular ground is 120 m^2 and its length is 12 mdot ...

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  12. Find the perimeter of the following figure:

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  13. A room is 8m long and 6m wide. Its floor is to be covered with rect...

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  14. The length and breadth of a rectangular park are in the ratio 5:3 a...

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  15. The total cost of flooring a room at Rs.85 per m^2 is Rs .5100. If the...

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  16. A square sheet of side 5cm is cut out from a rectangular piece of a...

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  17. Find the perimeter of each of the following shapes:

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  18. A square sheet of 2cm is cut from each corner of a rectangular piec...

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  19. A room is 12.5 m long and 8m wide. A square carpet of side 8m is la...

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  20. The area of a square field is 36\ m^2dot A path of uniform width is la...

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