The answer is 3937 or 3938. I tried to solve the question but I got 31.1. Can someone please help me understand what I did wrong.

Answer:
3937.5 or 3938 after round-off
Step-by-step explanation:
11 minutes 15 seconds = 11.25 minutes
5 members of the family shower 7 times a week for 11.25 minutes
=total of 393.75 minutes
393.75 times the amount of water used which is 10 litres becomes 3937.5
I hope this helps
Answer:
Given:
One shower lasts 11 mins. 15 secs. = 11.25 mins.
Total members = 5
Consumption rate = 10L/min.
Total amount consumed in a week = 10 x 11.25 x 5 X 7
= 11.25 x 350
= 3937.5 L
Hope this helps!