The mass of one meter of rail is 32 kg. How many cars with a carrying capacity of 60 tons

The mass of one meter of rail is 32 kg. How many cars with a carrying capacity of 60 tons are needed to move all the rails to build a 180 km long road?

Decision:

1) First, let’s find how many one-meter rails are needed to build a road 180 km long, knowing that 1 km is 1000 m:

180 km = 180,000 m

Then you need 180,000 pieces of one-meter rails.

2) We know that the mass of a one-meter rail is 32 kg, we find how much 180,000 pieces of rails weigh:

180,000 * 32 = 5,760,000 (kg).

3) Now we find out how many wagons with a carrying capacity of 60 tons are needed to transport all the rails, knowing that in 1 ton – 1000 kg:

5,760,000 / 60,000 = 96 (wagons).

Answer: you need 96 cars.