Kazipet, with a population of 4000, needs 9 litres of water per person per day. It has a cuboidal tank measuring 15 m × 8 m × 6 m. If the tank is completely full, for how many days will its water last?
A25 days
B30 days
C10 days
D20 days
Answer & Solution
Correct answer: D. 20 days
1. Tank volume = 15 × 8 × 6 = 720 m³ = 720000 litres.
2. Daily requirement = 4000 × 9 = 36000 litres.
3. Days = 720000 ÷ 36000 = 20 days.
_Source: RRB Group D CEN-02/2018 PYQ, Q.16._
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