Kanchan covers a certain distance with a speed of 66 km/h and another

1.	Kanchan covers a certain distance with a speed of 66 km/h and another equal distance at a speed of 33 km/h . Find her average speed.1. 44 km/h2. 64 km/h3. 45 km/h4. 25 km/h
Answer» Correct Answer - Option 1 : 44 km/h Given: Speeds are 66 km/h and 33 km/h and distance is same both times. Formula used: If two different speed are given but travel equal distance, then average speed is calculation as follows: Average speed = 2(Product of speeds)/(Sum of speeds) Calculation: Average speed = 2(66 × 33)/(66 + 33) ⇒ 4356/99 ⇒ 44 km/h Alternative method: Let the distance travel in each speed is 66 km. Average speed = Total distance travelled/Total time taken ⇒ [(66 + 66)]/[(66/66) + (66/33)] ⇒ 132/3 ⇒ 44 km/h

Kanchan covers a certain distance with a speed of 66 km/h and another equal distance at a speed of 33 km/h . Find her average speed.1. 44 km/h2. 64 km/h3. 45 km/h4. 25 km/h

Answer» Correct Answer - Option 1 : 44 km/h

Given:

Speeds are 66 km/h and 33 km/h and distance is same both times.

Formula used:

If two different speed are given but travel equal distance, then average speed is calculation as follows:

Average speed = 2(Product of speeds)/(Sum of speeds)

Calculation:

Average speed = 2(66 × 33)/(66 + 33)

⇒ 4356/99

⇒ 44 km/h

Alternative method:

Let the distance travel in each speed is 66 km.

Average speed = Total distance travelled/Total time taken

⇒ [(66 + 66)]/[(66/66) + (66/33)]

⇒ 132/3

⇒ 44 km/h

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