anonymous one year ago Jan types at an average rate of 12 pages per hour .at that rate,how long will it take Jan to type 100 pages?

1. skullpatrol

Any ideas?

2. skullpatrol

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3. imqwerty

Adjust ur typing speed to 12pages per hour and practically find out :P :D Jk

4. skullpatrol

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5. anonymous

a) 8 hours and 3 minutes b)8 hours and 15 minutes c)8 hours and 20 minutes d)8 hours and 30 minutes e)8 hours and 33 1/3 minutes and the answer is c but why friends

6. anonymous

sorry friends i don t write the answers first bec the connection faild soory

7. imqwerty

Its okhay :)

8. anonymous

ok can u help

9. skullpatrol

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10. imqwerty

1hour--------------------->12pages 1/12hours--------------->1page Multiply both sides by100 So 100/12hours---------->100pages

11. skullpatrol

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12. imqwerty

So 100/12hrs = 100/12 x60mins r needed to type 100pages So he needs 500mins So that is 8hours 20mins :)

13. anonymous

sorry imqwerty but how u know that 1/12 hours ----- 1pages

14. phi

a few ways, but this might be the best: rate * time = amount this is almost the same problem as if you go 12 miles per hour, how long to go 100 miles? here rate is 12 pages per hour 12 * t = 1 page (this is to find how long it takes to type 1 page) t = 1/12

15. phi

but of course you really want 12 * t = 100 and to solve, divide both sides by 12 t= 100/12

16. phi

you could also use ratios $\frac{12 \ pages}{1 \ hour}= \frac{100 \ pages}{x \ hours}$

17. anonymous

ok phi but the answer will be by point how i keep it 8 h and 20 how i know that the anser is 20 m not other minutees

18. anonymous

plz help

19. phi

first what is 100/12 ?

20. anonymous

100/12 is 8.333333333

21. anonymous

or 25/3

22. phi

ok, write it as a mixed number 8 and a fraction

23. anonymous

49/3

24. imqwerty

@Nourage i jst divided both sides by 12 to find out time taken to write 1 page :)

25. phi

like this 25/3 3 goes into 25 8 times with a remainder of 1 write the remainder over 3 $\frac{25}{3}= 8 \frac{1}{3}$

26. phi

that means it takes 8 and 1/3 hours that is a good answer, but they have the choices as 8 and some number of minutes. we have to change 1/3 of an hour into minutes we know 1 hour is 60 minutes 1/3 * 60 = number of minutes.

27. anonymous

oh ya thank u very very much friend u are the best (phi) and thank u friends all of u helps me

28. anonymous

thanks friends