waec model questions vol6 2024 mathematics
Objective • Question 5
Question 5
WAEC_MODEL_QUESTIONS_VOL6
•
2024
Water flows into a tank at a rate of \(2t+8\) litres per minute, where \(t\) is the time in minutes after the start. Water simultaneously drains from the tank at a constant rate of 5 litres per minute. The tank is initially empty. After 4 minutes it contains 20 litres. If the tank's capacity is 100 litres, to the nearest hundredth of a minute, how long after the start will the tank become full?
Answer Options
Correct Answer
A.
9.51 minutes
B.
8.73 minutes
C.
7.95 minutes
D.
10.24 minutes
Correct Answer
A
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