Aplane flew between two cities at 330 mi/hr; a car went the same distance at 55 mi/hr. if the car took 7.5 hr longer, how far apart are the cities?

The distance between two cities is 495 miles

Step-by-step explanation:

Given as :

The speed of plan flew between two cities = 330 mph

The speed of car traveling between two cities = 55 mph

Let the time taken by plan = T hours

So, The time taken by car = ( T + 7. 5 ) hours

Let the Distance between the cities  = D  miles

As, Distance = Speed × Time

So, Distance cover by plan = D = 330 mph × T h

And Distance cover by Car = D = 55 mph × ( T + 7.5 )  h

Or,  55 mph × ( T + 7.5 )  h = 330 mph × T h

Or,  55 T + 412.5 = 330 T

Or,   412.5 = 330 T - 55 T

Or,   412.5 = 275 T

∴    T = hours

Or , T = 1.5 hours

o, Distance = Speed × Time

Or , D = 330 mph × 1. 5 h

SO, D = 495 miles

Hence The distance between two cities is 495 miles   Answer

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this