Question

A painter can paint a door in 1 hour 15 minutes. How many doors can he paint in 8 hours 45 minutes?

Answer 1

If the painter can paint a door in 1 hour 15 minutes, he can paint 7 (8.75/1.25) doors in 8 hours 45 minutes. 8 hrs 45 min=8.75hrs. 1 hr 15 min=1.25 hrs. Number of doors = 8.75/1.25=7 doors!

Answer 2

to paint 1 door it takes 1 hour 45 minutes=60+5=75 minutes
to find the number of doors which he can paint in 8 hours 45 mi9nutres=8*60+45=480+45=525
\

now 525/75=7

hence he can paint 7 doors