Measurement (area & perimeter): Rock Nests
The Problem
River chub live in the Mississippi river. In one area of the river, their nests have a diameter of 1 m. The stretch of river is 21 m long and 11 m wide.
There is a gap of 1 m between each nest and a gap of 1 m on each bank.
1) What is the area of this stretch of river?
2) What is the area taken up by the nests?
3) What is the area of the rest of the river?
4) How many nests can fit into this area?
Did you know?
The Mississippi River is the second longest river in North America, flowing 3,766 km from its source at Lake Itasca through the centre of the USA to the Gulf of Mexico.
Visualising the Problem and Getting Started
Jamal said, “If the river was 11 m long and 7 m wide there would be 15 nests.”
Do you agree with Jamal? How do you know?
