What is an example of an implied contract?

Ordering a burger at a restaurant- there is an implied contract that the restaurant will fill your order (i.e. serve you whatever you order) and its implied that you pay for that.

Ambulance taking you to an emergency room. There is an implied contract between you and the hospital for payment (this is true even if you claim you never gave consent to be treated).

Another example of implied contract :

A coolie(railway laborer) picks up the articles owned by the tourist without asking the tourist and tourist also don't stop him to pick up his carriage, this shows the consent of the tourist. So, there is contact between both. This type of contract is called implied contract.