A tap fills a bucket at 15 litres per minute. Each bucket holds 9 litres. How many seconds does it take to fill 5 buckets?
Answer and explanation
Correct answer: B. 180 seconds
- Step 1: 5 buckets hold 5 × 9 = 45 litres. Step 2. 45 ÷ 15 = 3 minutes. Step 3. 3 × 60 = 180 seconds. Answer: 180 seconds. Why not the others: 3 seconds: This is 45 litres divided by 15 with the units mistaken. 36 seconds: This is the time to fill one bucket only. 60 seconds: This is the time for 15 litres, a single minute.
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