Question

how many a student have to study daily give a scientific reason.

Answer 1

Answer

hmmm

for 1-5 class---  1 hour a day is ok other than school or online class

for 6-8 class--- 2 hour

for 9-10 class --- 3-4 hour

for 11 and 12 class----5-6 hour

this is only of self study