Length of each side of a rhombus is 13 cm and one of the diagonal is 24 cm. What is the area (in cm2) of the rhombus ?

This question was previously asked in
SSC CGL 2020 Tier-I Official Paper 1 (Held On : 13 Aug 2021 Shift 1)
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  1. 60
  2. 120
  3. 300
  4. 240

Answer (Detailed Solution Below)

Option 2 : 120
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PYST 1:SSC CGL 2023 - Quantitative Aptitude(Held On:14 Jul 2023 Shift 1)
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Detailed Solution

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Given:

Side (a) of rhombus = 13 cm 

Length of one diagonal (p) = 24 cm 

Formulas used:

F1 Arun K 07-01-22 Savita D2

a = (p2 + q2 )1/2÷ 2

Area of rhombus = 1/2 × p × q

Calculation:

Let the other diagonal of rhombus = q 

⇒ (242 + q2)1/2 ÷ 2 = 13

⇒ (576 + q2)1/2 = 26

⇒ 576 + q2 = (26)2

⇒ 676 - 576 = q2

⇒ q = √100 = 10 

Area = 1/2 × 24 × 10 = 120 cm2

∴ The correct answer is 120 cm2.

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