A is twice as fast as B and B is thrice as fast as C. The journey cove

1.	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 min2. 27 min3. 36 min4. 54 min
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.

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 min2. 27 min3. 36 min4. 54 min

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.

Discussion

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