Question

If a typist types 900 words in 30, her rate of typing is words per minutes.​

Answer 1

Answer:

First, find out the speed of a single typist. Given the first conditions you can find that:

3 typists can type 900 words/6 minutes = 150 words/minute

Therefore one typist can type 150/3 = 50 words per minute.

Now that you know that, the problem is easy.

Multiply that number by 7 to get the speed of 7 typists per minute: 50*7= 350words/minute.

Finally, multiply that number by 4, to get the amount of words written by these typists.

350words/minute * 4minutes = 1400 words