A square piece of glass has an area of 576 cm2, which is placed on a table. The width between the piece of glass and the edge of the table is 7 cm. Find the length of the table?

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RPF SI (2018) Official Paper (Held On: 19 Dec 2018 Shift 3)
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  1. 38 cm 
  2. 28 cm
  3. 40 cm 
  4. 32 cm

Answer (Detailed Solution Below)

Option 1 : 38 cm 
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Detailed Solution

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Concept:

To find the length of the table, we need to first determine the side length of the square piece of glass and then add the width on both sides.

Formula Used:

Area of a square = side × side

Calculation:

We have,

⇒ Area = 576 cm2

⇒ side × side = 576

⇒ side = 24 cm

Width between the glass and the edge of the table is 7 cm on each side.

⇒ Total length of the table = side + 2 × width

⇒ Total length of the table = 24 cm + 2 × 7 cm

⇒ Total length of the table = 24 cm + 14 cm

⇒ Total length of the table = 38 cm

∴ The length of the table is 38 cm.

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