# Question #9ff49

##### 1 Answer

May 25, 2017

#### Answer:

The velocity of two planes are respectively 100mph and 200mph.

#### Explanation:

Suppose,one planes speed and anothers are respectively x mph and(x+140) mph.

In one hour first plane goes x mile and the other (x+140) mile.

According to problem,

The velocity cannot be negative so the velocity of the plane is 100 mph.

The other's is 200 mph.