Question 67 of 90beginner🔧 ApplyShort Answer2 marks

Mary and Daisy filled their bottle with 1 l 400 ml of water. They wondered about the capacity of the bottle in ml. How much is it? Mary says 1,400 ml. Daisy says 1,040 ml. Who do you think is correct and why?

Correct Answer

Mary is correct.

Given: 1 l 400 ml

Step 1: Convert 1 l to millilitres. 1 l = 1,000 ml

Step 2: Add the remaining millilitres. 1,000 ml + 400 ml = 1,400 ml

Answer: 1 l 400 ml = 1,400 ml

Why Daisy is incorrect: Daisy incorrectly converted 1 l 400 ml as 1,040 ml, which would be 1 l 40 ml.

Exercise: Let Us Think | Q: 71 | (Page Page 12)
For More Understanding

Explanation

The chapter explains conversion between l and ml. When converting 1 l 400 ml to millilitres, first convert l to ml: 1 l = 1,000 ml. Then add the remaining ml: 1,000 ml + 400 ml = 1,400 ml. Daisy made an error by treating 400 ml as 40 ml.

Solution Steps

  1. Step 1: Convert 1 l to millilitres: 1×11 \times 1,000 = 1,000 ml

  2. Step 2: Add the remaining millilitres: 1,000 ml + 400 ml = 1,400 ml

  3. Step 3: Therefore, 1 l 400 ml = 1,400 ml, not 1,040 ml

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