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  1. The area of an equilateral triangle is 48 sq. cm. The length of the side is
    1. √8 × 4 c m
    2. 4√3 cm
    3. 8 cm
    4. 16 cm
    5. None of these
Correct Option: E

Using Rule 6,

Area of equilateral triangle =
√3
 × side²
4

⇒
√3
 × (side)² = 48
4

(side)² =
48 × 4
√3

=
16 × √3 × √3 × 4
 = 64√3
√3

∴ Side = √64√3 = 84√3cm


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