A, B ์ด๋ ‡๊ฒŒ ๋‘ ๋ชจ์ง‘ ๋ฐฐ๋„ˆ๊ฐ€ ์žˆ์„ ๋•Œ


A ๋ฐฐ๋„ˆ์—์„œ 40๋ฒˆ ๋ฝ‘์œผ๋ฉด B ๋ฐฐ๋„ˆ์—์„  30๋ฒˆ๋งŒ ๋ฝ‘์•„๋„ ํ™•์ •์ด ๋‚˜์˜ค๋Š”๊ฑฐ์ž„??


์•„๋‹ˆ๋ฉด ๊ฐ ๋ฐฐ๋„ˆ๋งˆ๋‹ค ์ฒœ์žฅ ์Šคํƒ ๋”ฐ๋กœ ์œ ์ง€๋˜๋Š”๊ฑฐ์ž„?