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The length and breadth of a rectangle are in the ratio 3 : 1. If the breadth is 7cm, then the length of the rectangle is:
  • a)
    14 cm
  • b)
    16 cm
  • c)
    18 cm
  • d)
    21 cm
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
The length and breadth of a rectangle are in the ratio 3 : 1. If the b...
Solution:

Let the length of the rectangle be l.

Given, breadth of the rectangle = 7 cm

Length and breadth are in the ratio 3 : 1

Therefore, length : breadth = 3 : 1

We know that,

Length = (length : breadth) × breadth

Length = (3 : 1) × 7

Length = 21 cm

Hence, the length of the rectangle is 21 cm.

Therefore, option (d) is the correct answer.
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Community Answer
The length and breadth of a rectangle are in the ratio 3 : 1. If the b...
21cm
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The length and breadth of a rectangle are in the ratio 3 : 1. If the breadth is 7cm, then the length of the rectangle is:a) 14 cmb) 16 cmc) 18 cmd) 21 cmCorrect answer is option 'D'. Can you explain this answer?
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