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1. A 45000 litter water tank is to be filled at the rate of 220 litters per minute. Estimate, to the nearest half an hour, how long it will take to fill the tank?
- A. 4 hours
- B. 4 hours
- C. 4 hours
- D. 4 hours
Answer: Option B
Explanation:
Assume that the tank fills in x minutes
By Direct Proportion,
x1/y1 = x2/y2
220/1 = 45000/x
x = 45000/220
x = 204.54
x = 205 minutes (approx.)
Divide x by 60 in order to convert from Minutes to Hours
⇒ 205/60 = 3.41 hours
Estimating to nearest half hours,
The 45000 L tank is filled in 3.5 hours at the rate of 220 L/m
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