Question

Saleem can type 30 words per minute and ranjit can type 50 words per minute.if saleem needs 30 minutes to finish typing a piece of work how long will ranjit take to finish the same work?

Answer 1

if saleem can type 30 words in a minute and ranjit can type 50 words in the same time
so, 30 words = 1 min for saleem
how much words= 30 min
by cross multiplication,
30*30 / 1= 900 words
saleem can type 900 words in 30 min

Similarly, 50 words= 1 min for ranjit
900 words= how much time
900/50 = 18 mins

thus, ranjit take 18 minutes to finish the same work