40 tonnes of gravel

On the first day of the Christmas holiday I ordered 40 tonnes of gravel. I ordered it in the morning and it was delivered in the afternoon. I asked them to send it in four, 10 tonne lorries. 20 tonnes were used for the driveway.

10 tonnes were used for my neighbour's gateway (part of the contract when buying the land).

Which leaves me a spare 10 tonnes for other paths, and repairs.