Question

it takes one by two minutes to cook one dosa how many dosas can in one by two hours

Answer 1

1/2 minutes = 30 seconds = 1 dosa
and 1 minute = 2 dosa
1/2 hour = 30 minutes = 30×2 = 60 dosas

HOPE IT HELPS YOU

Answer 2

1/2 min =30sec

1/2hrs = 1800sec

1/2min = one dosa

1/2 hrs = ?

by problem

in  1/2 hrs we can cook no.of dosas = 1800/30

                                                           = 60 dosas