3 years ago

a girl age is 21 year old and her brother is a third her age.When the girl is 36,what will be the age of her brother?

Mathematics

2 answers:

umka2103 [35]3 years ago

3 0

Her brother is 7 years old at the moment. He will be 21 when his sister is 36.

Dmitry [639]3 years ago

3 0

I hope this helps you

brothers age 3.?=21 ?=7

when girl 36

now she is 21

36=21+15 it's have to past 15 years

15 years later brothers age

7+15=22

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