Answer 1

Volume of cuboidal reservoir = 108 m³ = (108 × 1000) L = 108000 L

It is given that water is being poured at the rate of 60 L per minute.

That is, (60 × 60) L = 3600 L per hour

Required number of hours  = `108000/3600` = 30 hour

Thus, it will take 30 hours to fill the reservoir.