Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Grace can read a 200-page book in 20 hours. How long would it take her to finish reading a 250-page book at this constant rate?

### Response:
 Grace anaweza kusoma kurasa 200 kwa masaa 20, hivyo anaweza kumaliza kitabu chenye kurasa 250 kwa masaa 250/10 = <<250/10=25>>25.