A plane flies between 4 cities; A, B, C and D. Passengers board and alight at each airport in every city when it departs and lands, respectively.  The distance between city A and city B is 100 miles.  The distance between city B and city C is 50 miles more than the distance between city A and city B.  The distance between city C and city D is twice the distance between city B and city C. Calculate the total distance between city A and city D.
Since the distance between city A and B is 100 miles, and city B and C are 50 more miles apart than city A and B, then city B and C are 100+50 = <<100+50=150>>150 miles apart.
The plane's total flying distance between cities A and C is 100+150= <<100+150=250>>250 miles.
The distance between city C and city D is twice the distance between city B and city C, meaning city C and city D are 2*150 = <<300=300>>300 miles apart.
The plane flies a distance of 250+300 = <<250+300=550>>550 miles from city A to city D.
#### 550
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
You are solving math problems. Here are some examples of how to solve the task:

Nikola is saving up for a bag of ant food before he can start his ant farm. He wants 400 ants in his farm. Each ant needs 2 ounces of food. Every ounce of ant food costs $.1. Nikola is saving up by raking leaves. He charges $5 to start a job and then he charges by the leaf. Each leaf he rakes costs 1 penny. He finally saved up enough money after he raked 6,000 leaves. How many jobs did he complete?The ants will need 800 ounces of food because 400 x 2 = <<400*2=800>>800
The ant food will cost $80 because 800 x .1 = <<800*.1=80>>80
He has earned $60 from the leaves he has raked because 6000 leaves * $0.01/leaf = $<<6000*0.01=60>>60
He earned $20 from all his jobs because 80 - 60 = <<80-60=20>>20
He completed 4 jobs because 20 / 5 = <<20/5=4>>4
#### 4[END]

Tara has a shoebox that is 4 inches tall and 6 inches wide. She puts a square block inside that is 4 inches per side. How many square inches of the box are left uncovered?The shoebox is 24 square inches because 4 x 6 = <<4*6=24>>24
The block is 16 square inches because 4 x 4 = <<4*4=16>>16
There are 8 square inches uncovered because 24 - 16 = <<24-16=8>>8
#### 8[END]

Now, solve this next question in the style of the above examples:

A plane flies between 4 cities; A, B, C and D. Passengers board and alight at each airport in every city when it departs and lands, respectively.  The distance between city A and city B is 100 miles.  The distance between city B and city C is 50 miles more than the distance between city A and city B.  The distance between city C and city D is twice the distance between city B and city C. Calculate the total distance between city A and city D.

### Response:
Since the distance between city A and B is 100 miles, and city B and C are 50 more miles apart than city A and B, then city B and C are 100+50 = <<100+50=150>>150 miles apart.
The plane's total flying distance between cities A and C is 100+150= <<100+150=250>>250 miles.
The distance between city C and city D is twice the distance between city B and city C, meaning city C and city D are 2*150 = <<300=300>>300 miles apart.
The plane flies a distance of 250+300 = <<250+300=550>>550 miles from city A to city D.
#### 550