Question 5 of 21intermediate🔧 ApplyNumerical3 marks

Red and blue flags are to be placed alternately at every 50 m. How many red and blue flags are needed till the finish line?

Correct Answer

Given: Total distance = 3000 m

Calculation: Number of flag positions = 3000 ÷ 50 = 60

Since flags are placed alternately: 60 ÷ 2 = 30 of each colour

Answer: 30 red flags and 30 blue flags are needed.

Exercise: Kilometre Race | Q: 3 | (Page Page 4)
For More Understanding

Explanation

Students calculate the total number of flag positions and then divide equally between red and blue flags since they alternate.

Solution Steps

  1. Step 1: Total distance = 3000 m

  2. Step 2: Interval = 50 m

  3. Step 3: Total flag positions = 3000 ÷ 50 = 60

  4. Step 4: Since red and blue alternate, each colour has half: 60 ÷ 2 = 30 of each colour

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