Final answer:
The cabin costs $6,000 and the land costs $24,000.
Step-by-step explanation:
Let's assume the cost of the cabin is C. According to the given information, the land costs 4 times as much as the cabin, so the cost of the land is 4C. The total cost of the cabin and land is $30,000. We can set up the equation: C + 4C = $30,000. Combining like terms, we get 5C = $30,000. Dividing both sides of the equation by 5, we find that C = $6,000. Therefore, the cabin costs $6,000 and the land costs 4 times that amount, which is $24,000.