Question

salim read 3 hours 45minuts and radha read240minuts.who read more and by how much

Answer 1

Radha read more by 15 minutes.

Answer 2

salim
3 hours 45 minutes= 3×60 + 45
                               = 180+45
                               =225 minutes
radha
240 minutes

so radha read more than salim by 15 minutes(240-225=15)