A plane took off from city A to city B. Two hours later, another plane flew out of city B towards him.

A plane took off from city A to city B. Two hours later, another plane flew out of city B towards him. The first plane flew 1650 km per hour in 5 hours before the meeting. The distance between the cities is 2520 km. How much faster is the first plane than the second?

1) Let’s find the speed of the 1st plane:

1650: 5 = 330 (km / h);

2) Let’s find how many kilometers the second plane flew before the meeting:

2520 – 1650 = 870 (km);

3) Find the speed of the 2nd plane:

870: (5 – 2) = 290 (km / h);

4) Let’s find how much the speed of the 1st plane is greater than the speed of the 2nd plane:

330 – 290 = 40 (km / h).

Answer: the speed of the 1st plane is 40 km / h more than the speed of the 2nd plane.