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

### Instruction:
 汤姆每分钟可以打90个字。一页有450个字。他打10页需要多长时间？


### Response:
 他可以在5分钟内打完一页。所以他打10页需要5分钟 x 10 = 50分钟。