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Question

Jane can type 60 words per minute and it takes her 35 minutes to write a letter.

John can type 50 words per minute.

How long would it take him to write the same letter?


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Solution

Calculate the time required by John to type the same letter

Typing speed of Jane =60 words per minute.
Time Jane took to write the letter =35 minutes.
Total number of words Jane wrote=60×35=2100 words.

Since John has to write the same letter, he will be typing a total of 2100 words.
Typing speed of John =50 words per minute.
Time John took to write the letter =210050=42 minutes.

John will take 42 minutes to write the same letter.


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