Year 8 Interactive Maths - Second Edition

Problem Solving Unit

Problem 12.1  Pebble Path

Zara built a new house that has a large backyard.  She decided to make a rectangular flower bed that is 15 m long and 12 m wide.  She also wants to build a 1.50 m wide pebble path around the flower bed.

1.  Draw a diagram of the flower bed with a path around it.

2.  Find the area of the flower bed.

3.  Fertiliser is needed for the proper growth of the flower bed.  If 1 bag of fertiliser covers 9 m², how many bags of fertiliser will Zara need to buy?

4.  Find the area of the pebble path around the flower bed.

5.  Pebble mix can be bought in bags costing $7.75 and can cover approximately 0.8 m² at the required depth for a path.  How much will Zara pay for the pebble mix?