Question

A copy machine makes
36
copies per minute. How long does it take to make
135
copies?

Answer 1

which operation do you think you must use?

Answer 2

cross multiply

Answer 3

ok so multiply 36 times 136

Answer 4

4896

Answer 5

135 divided by 36 = 3 minutes and ( 36 x 3 = 108 ) ( 135-108= 27 ) ( so that equals to 3 parts out of 4 ( 3 x 9 = 27 and 4x9= 36 )) 3 out of 4 parts equals 0.75, so it would be 3.75 minutes but this would then become 3 minutes and 45 seconds. also equals to 225 seconds

Answer 6

ok good