A rectangular savannah is 30m long by 15m wide. The Ministry of Education wants to fence that savannah using posts and wire. If the posts, costing $18.00 each, are placed 5m apart andt the wire cost $35.00 per metre. Calculate the cost of the posts and wire for fencing that savannah.
6 answers
Draw a diagram placing the posts. How many posts are needed?
Six posts are on one side. What about the other three sides?
Did you draw a diagram?
Did you draw a diagram?
18 posts
Right.
The cost of the posts:
18 * 18 = ?
How much wire is needed?
The cost of the posts:
18 * 18 = ?
How much wire is needed?
15X 35 =525 x2 = 1050
30X 35 = 1050 x 2 = 2100
total cost of wire = $3,150
30X 35 = 1050 x 2 = 2100
total cost of wire = $3,150
Where did you get those numbers?
Your answer us right, but impossible to get with your figures.
P = 2L + 2W
P = (2 * 30) + (2 * 15)
P = 90 meters
Cost of wire = 90 * 35
Your answer us right, but impossible to get with your figures.
P = 2L + 2W
P = (2 * 30) + (2 * 15)
P = 90 meters
Cost of wire = 90 * 35
1 answer