The mass of coal in a railway carriage is 60 tons. A dump truck can take a third of this cargo

The mass of coal in a railway carriage is 60 tons. A dump truck can take a third of this cargo. How many trips should a dump truck take to unload 6 such wagons?

Let’s solve this task by actions with explanations.
1) 60: 3 = 20 tons of cargo – a dump truck can take, since it can take a third of the cargo of 60 tons;
2) 60 * 6 = 360 tons of cargo – fits in 6 such railway wagons, 60 tons each;
3) 360: 20 = 18 trips – must be done on a dump truck to unload 360 tons of coal.
Answer: 18 flights.