## MauriceLong 3 years ago I need help with this. Can someone help me please. A wheel makes 6 7/15 revolutions per minute. If it rotates for 80 minutes, how many revolutions does it make?

1. AbhimanyuPudi

67/15 x 80 = 357.33 revolutions

2. ganeshie8

since per minute its making 6 full revolutions + 7/15th of a revolution, in 80 minutes it would make 80*6 + 80*7/15 revolutions

3. MauriceLong

How you multiply 7/15

4. MauriceLong

Im still confuse with this problem.

5. ganeshie8

which part u confuse wid ? did u get how it makes ( 80*6 + 80*7/15 ) revolutions in 80 minutes ?

6. MauriceLong

i kind of got it but not really. Algebra is very complicated

7. ganeshie8

if we rush, it looks complicated. go slow, then it would make sense

8. MauriceLong

80*6=480+80=560*7/15 im comfuse with the 7/15

9. ganeshie8

ok, so u get how its ( 80*6 + 80*7/15 ) revolutions in 80 minutes, but u want to knw how to simplify it, right ?

10. MauriceLong

yes, your right. how too simplify it

11. ganeshie8

80*6 + 80*7/15 480 + 560/15

12. ganeshie8

we can simplify further.

13. MauriceLong

How would you answer the problem.

14. ganeshie8

80*6 + 80*7/15 480 + 560/15 480 + (555 + 5)/15

15. ganeshie8

80*6 + 80*7/15 480 + 560/15 480 + (555 + 5)/15 480 + 555/15 + 5/15

16. ganeshie8

fine, so far ?

17. ganeshie8

i did nothing fancy, i just wrote 560 = 555 + 5

18. MauriceLong

ok.

19. MauriceLong

20. ganeshie8

15 goes in 555 , right ?

21. MauriceLong

yes

22. ganeshie8

80*6 + 80*7/15 480 + 560/15 480 + (555 + 5)/15 480 + 555/15 + 5/15 480 + 37 + 5/15

23. ganeshie8

15 goes in 555, 37 times

24. ganeshie8

80*6 + 80*7/15 480 + 560/15 480 + (555 + 5)/15 480 + 555/15 + 5/15 480 + 37 + 5/15 517 + 5/15

25. ganeshie8

80*6 + 80*7/15 480 + 560/15 480 + (555 + 5)/15 480 + 555/15 + 5/15 480 + 37 + 5/15 517 + 5/15 517 + 1/3 517 1/3

26. ganeshie8

we are done wid simplifying !

27. ganeshie8

see if that makes sense :)

28. MauriceLong

ok it does make since. I get it lol

29. ganeshie8

30. MauriceLong

thank you so much

31. ganeshie8

np.. yw !