If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is

Given- Number of places- 4 nos
Population- 40 Lakhs
Duration- 4 hr
No. of steams- 3 nos (Discharge of each steams= 1100 L/minute)
Solution :
Total Quantity of water required = 4(places) X 3(steams) X 1100 (L/min) X 60 X 4 (hours)
= 3168 kilo liters ~ 2880 kiloliters (According to options take nearest value)

Satpal is correct

Which formula have use to solve problem

Total quantity of water required = No of fires x Discharge x Time of each fire.

= 4 x (3 x 1000) x (4 x 60) = 2880000 liters = 2880 kilo liters. (where, 1000 liters/minute is discharge of each stream)