Source: Extra Practice

The average distance from the Earth to the Moon is approximately 384,400 km384,400 \text{ km}. If a space probe travels at an average speed of 4000 km/hour4000 \text{ km/hour}, about how many hours would it take to reach the Moon?

Options

Option A is correct

96.1 hours96.1 \text{ hours}

Option B

961 hours961 \text{ hours}

Option C

9.61 hours9.61 \text{ hours}

Option D

9610 hours9610 \text{ hours}

Explanation

To find the time taken, we use the formula: Time=DistanceSpeed\text{Time} = \frac{\text{Distance}}{\text{Speed}}.\nGiven Distance =384,400 km= 384,400 \text{ km} and Speed =4000 km/hour= 4000 \text{ km/hour}.\nTime=384,400 km4000 km/hour=384440 hours\text{Time} = \frac{384,400 \text{ km}}{4000 \text{ km/hour}} = \frac{3844}{40} \text{ hours}.\nDividing 38443844 by 4040 gives 96.196.1. Therefore, it would take approximately 96.1 hours96.1 \text{ hours}.