Question

Adrianna can read 7 pages in 10 minutes. At this rate,how many pages can she read in 25 minutes

Answer 1

Use a proportion. 7/10 = x/25. Multiply 10 by 2.5 to get 25. Similarly, multiply 7 by 2.5 to get 17.5. 17 1/2 pages.

Answer 2

Answer: She can read 17 and a half page in 25 minutes.

Step-by-step explanation:

We assume that the number of pages is directly proportional to the number of minutes taken to read them.

Given : Adrianna can read 7 pages in 10 minutes.

Rate of reading=$\dfrac{\text{Number of pages}}{\text{Time}}=\dfrac{7}{10}$  (1)

Let x denotes the number of pages she read in 25 minutes.

Rate of reading =$\dfrac{x}{25}$   (2)

From (1) and (2) , we have

$\dfrac{x}{25}=\dfrac{7}{10}$   [in direct variation ration  remains constant.]

$x=\dfrac{7\times25}{10}=\dfrac{175}{10}=17\dfrac{1}{2}$

Hence, She can read 17 and a half page in 25 minutes.