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.

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=
`\frac{\text{Number of pages}}{\text{Time}}=(7)/(10)` (1)

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

Rate of reading =
`(x)/(25)` (2)

From (1) and (2) , we have

`(x)/(25)=(7)/(10)` [in direct variation ration remains constant.]

`x=(7*25)/(10)=(175)/(10)=17(1)/(2)`

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