A Ship Travelling Due East Sights A Lighthouse At N 61 33 E After 2 Hours And 48

A ship travelling due east sights a lighthouse at N 61°33′ E. After 2 hours and 48 minutes, the ship reaches a rock that the map says is 45 km due south of the lighthouse. How fast is the ship travelling, in km/h?

Round answer to 3 decimal places.

(plz help ASAP)

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