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A is twice as fast as B and B is thrice as fast as C. The journey covered by A in 9 min will be covered by C in?
1. 18 min
2. 27 min
3. 36 min
4. 54 min

1 Answer

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Best answer
Correct Answer - Option 4 : 54 min

Given:

A is twice as fast as B,

B is thrice as fast as C.

A covered journey in 9 minutes

Formula Used:

Speed = Distance/Time 

Calculation:

According to the question,

⇒ A = 2B and B = 3C

Let speed of C be 1 unit per min.

Speed of B will be,

⇒ 3 × 1 unit per min.

⇒ 3 units per min.

Speed of A will be,

⇒ 2 × 3 units per min.

⇒ 6 units per min.

A required 9 minutes to cover the distance,

⇒ Distance = 6 × 9 = 54 units.

C will cover 54 units in,

⇒ 54/1 

⇒ 54 minutes.

∴ C will take 54 min. to cover the distance.

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