Question

The gear sets of a machines must be 6:7.
Find which of the following set of gear can be fitted into the machine if the gear set are in the ratio
1> 252:294
2> 312:378
3> 102:133

Answer 1

on your calculator, divide 6 by 7.

then compare 252/294, 312/378 and 102/133.

only one of them should give you the same answer as 6/7

Answer 2

I could divide all of them by 6 and 7

Answer 3

you could.

only one of them would give you 1 as an answer since (6/7)/(6/7) = 1

Answer 4

I think its 252:294 is the correct answer. Is that right?

Answer 5

yes

Answer 6

great thanks!