Question

lalita can complete 100 questions in 3 hr.how much time she will take to complete 25 questions?​

Answer 1

given:

lalita can complete 100 questions in 3 hours...
find the time to complete 1 question?

by unitary method...
100 questions = 3 hours
then, 1 question = 3/100 = 0.03 hours

find the time to complete 25 questions :-

by unitary method
1 question = 0.03 * 25 = 0.75 hours

now we know that,
1 hour = 60 minutes
0.75 hours = 60*0.75 = 45 minutes

hence she will take 45 minutes to complete 25 questions...

please mark this as brainliest.....

Answer 2

No of questions and time are directly proportional to each other.
Let m be the time she needs to complete 25 questions

Then 100:3 = 25:m
100m=25x3
m=(25x3)/100
=0.75 hrs or 45 min