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Question
A 45,000 liter water tank is to filled at the rate 220 liters per minute. Estimates to the nearest half hour, how long it will take to fill the tank?
4 hours
3.5 hours
3 hours
2.5 hours
ANSWER : 2
Descrption
<p>Assume that the tank fills in x minutes</p><p>By Direct Proportion,</p><p>x<sub>1</sub>/y<sub>1 </sub>= x<sub>2</sub>/y<sub>2</sub></p><p>220/1 = 45000/x</p><p>x = 45000/220</p><p>x = 204.54 </p><p>x = 205 minutes (approx.)</p><p>Divide x by 60 in order to convert from Minutes to Hours</p><p>⇒ 205/60 = 3.41 hours</p><p>Estimating to nearest half hours, </p><p>The 45000 L tank is filled in 3.5 hours at the rate of 220 L/m</p>
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