railway RRB JE (CBT I + CBT II) Mock Test 2024 Environmental Engineering Water Supply

As per the IS: 1172-1957 what is the amount of water in liters per head per day used for domestic purpose?

1
70 litres
2
135 litres
duplicate options found. English Question 1 options 1,2
3
350 litres
4
225 litres
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