a typist can type 70 words in 1 minute. then how many words can he type in 1.5 minutes?
105
To find out how many words a typist can type in 1.5 minutes, we can use the concept of ratios.
Let's set up a ratio to compare the number of words typed in 1 minute to the number of words typed in 1.5 minutes:
70 words : 1 minute = x words : 1.5 minutes
Since the number of words typed is directly proportional to the time spent typing, we can use this ratio to find the unknown variable, which is the number of words (x) typed in 1.5 minutes.
To find x, we can set up a proportion by cross-multiplying and solving for x:
70 words * 1.5 minutes = x words * 1 minute
105 words = x words
Therefore, a typist can type 105 words in 1.5 minutes.