Question

if A can solve 10 questions in 15 minutes and B can solve 10 in 20 minutes then how many questions both solve in 4 minutes​

Answer 1

10+2/3

Step-by-step explanation:

A:time taken to caluculate 1 question =90 sec

B:time taken to caluculate 1 question=30 sec

4 minutes=240sec

B:30×8=240

A:90+90+60=2+2/3

so

10 +2/3

questions will be solved