英语翻译Keith can key in 10 characters every 5 seconds using his mobile phone.(i) Find Keith’s rate of keying in characters per minute.(ii) Find the time taken in seconds for Keith to key in a message consisting of 60 characters.以及Leave your answer in positive indices.
问题描述：
英语翻译
Keith can key in 10 characters every 5 seconds using his mobile phone.
(i) Find Keith’s rate of keying in characters per minute.
(ii) Find the time taken in seconds for Keith to key in a message consisting
of 60 characters.
以及Leave your answer in positive indices.
答
Keith在她的手机中每5秒钟能输入10个字符,
（i）计算Keith每分钟能键入多少个字符
（ii）计算Keith输入一个60个字符的信息需要用多长时间