Question

Diego can type 140 words in 4 minutes. At this rate how long will it take him to type 385 words? How many words can he type in 15 minutes

Answer 1

Answer:

11 minutes will it take him to type 385 words.

525 words can he type in 15 minutes

Step-by-step explanation:

Unit rate can be expressed as a quantity of 1, such as 3 feet per second or 6 miles per hour.

As per the statement: Diego can type 140 words in 4 minute.

If      

140 words = 4 minutes

then;

1 words = $\frac{4}{140}=\frac{1}{35}$ minutes

Unit rate per words = $\frac{1}{35}$ minutes

To find how long will it take him to type 385 words.

$Number of minutes= unit rate per words \times 385$

                                  =$\frac{1}{35} \times 385 = 11$

therefore, 11 minutes will it take him to type 385 words

Now, to find how many words can he type in 15 minutes.

Calculate unit rate per minutes:

unit rate per minute = $\frac{140}{4} = 35$ words.

Number of words = $unit rate per minutes \times 15$

                              =$35 \times 15 = 525$ words

Therefore, 525 words can he type in 15 minutes