I'll give you a question, please answer with step-by-step reasoning process.
The pet shop grooms dogs. It takes 30 minutes to groom a poodle. It takes half as much time to groom a terrier as it takes to groom a poodle. They do not groom cats. If the pet shop grooms 3 poodles and 8 terriers, what is the total length of time it will take, in minutes?

210
At a rate of 30 minutes per poodle, 3 poodles will take 3 * 30 = 90 minutes.

If it takes half as much time to groom a terrier as it takes to groom a poodle, it takes 30 / 2 = 15 minutes per terrier.

At a rate of 15 minutes per terrier, 8 terriers will take 120 minutes.

Thus, in total, it will take the pet shop 90 + 120 = 210 minutes to groom 3 poodles and 8 terriers.

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Thus, the answer is 210