Question

Two planes fly in opposite directions. One travels 450 mi/h and the other 550 mi/h. How long will it take before they are 4,000 mi apart? The planes must fly Answer hours before they will be 4,000 mi apart.

Answer 1

Given,

The speed of first plane is 450 miles per hour.

The speed of second plane is 550 miles per hour.

The total distance between plane required is 4000 miles.

As, the planes are moving in opposite direction, then distance cover by both is must be added.

Number of distance both plane becomes apart in one hour is,

`\text{Number of distance = 450+550=1000 miles.}`

The Number of hours required to complete 4000 miles is,

`\text{Time=}\frac{4000}{\text{1}000}=4\text{ hours}`

Hence, it will take 4 hours before they are 4,000 miles apart.