It takes mike 18 minutes to finish reading 4 pages of a book . how long does it take for him to finish reading 30 pages.

Hello there!

18> 4 pages
x> 30 pages

Cross multiply

4 * x = 30 * 18

4x = 540

x = 540/4

x =135

It took him 135 minutes to read 30 pages.

Best of luck with your studies!

 The answer is:  "135 minutes" ; or,  write as:  "2 hr. and 15 minutes" .

Explanation:

4/18 = 30/ x ?  Solve for "x" (time in minutes).

4/18 = (4÷2) / (18÷2) = 2/9 .

 2/9 = 30/ x ;

2x = (9)(30) ;

2x = 270 ; 

Divide EACH side of the equation by "2" ;

2x / 2 = 270 / 2 ;

to get:

x = 135 minutes ; or,

since 60 minutes = 1 hr.

60 minutes * 2 = 120 minutes = 2 hr.

135 minutes  −  120 minutes = 15 minutes.

 The answer is:  "135 minutes" ; or, "2 hr. and 15 minutes" .

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