1200 poles were used to put a fence around the rectangular garden of length 2320 meters and width 80 meters. If each pole was bought at Ksh. 5200, how much money was spent on poles used on the width?

First, let's calculate the total perimeter of the rectangular garden:

Perimeter = 2(length + width)
Perimeter = 2(2320 + 80)
Perimeter = 2(2400)
Perimeter = 4800 meters

Now, let's calculate the number of poles used on the width:

Number of poles on the width = (Perimeter / 2) / width
Number of poles on the width = (4800 / 2) / 80
Number of poles on the width = 2400 / 80
Number of poles on the width = 30 poles

Now, let's calculate the total amount spent on poles used on the width:

Amount spent on poles on the width = Number of poles on the width * Cost per pole
Amount spent on poles on the width = 30 * 5200
Amount spent on poles on the width = Ksh. 156,000

Therefore, Ksh. 156,000 was spent on poles used on the width.

Step 1: Find the perimeter of the rectangular garden

Perimeter = 2(length + width)
Perimeter = 2(2320 + 80)
Perimeter = 4880 meters

Step 2: Calculate the number of poles used on the width

Number of poles on the width = Perimeter / Length
Number of poles on the width = 4880 / 2320
Number of poles on the width = 2 poles

Step 3: Calculate the cost of poles used on the width

Cost of poles on the width = Number of poles on the width - Cost of each pole
Cost of poles on the width = 2 poles - Ksh. 5200
Cost of poles on the width = Ksh. 10400

Therefore, the amount of money spent on poles used on the width is Ksh. 10400.