Question

a girl walk from her house her school if she walked 3 km per hour she reaches school in 45 minute how far is school
is from her house

Answer 1

3km =60min
so,30min =3km/2=1.5km
and, 15min=1.5/2=0.75km
therefore
60min-15min=3km-0.75km
45min=2.25km
2.25km from her house is her school

Answer 2

This is a question of Direct and inverse variation.so we would answer this through the process given in the chapter.

Speed=3km/hr
Time=45mins
=45/60hr
=3/4hr.


Distance of her school from her home=Speed×Time
=3×3/4
=9/4
2.25km.
Hope that it will help you!