Question

10 minutes a can type 50 words and b can type 40 words.together take how much time tovtype 360 words

Answer 1

4 minutes because suppose t time is taken by both a and b for type 360 words
so, (40+50)× t = 360
so the answer is 4 minutes

Answer 2

10 minutes a types= 50 words.
" " b types. = 40 words
together typing of 360 words t = ?
a+ b = 50+40= 90
in 10 min = 90words
t = 40min