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II Garden ponds II II II II II II II

The Frasers are designing a square garden pond.
They are planning to lay square slabs
with sides 1 m long around the pond's perimeter.
DJ If the pond is 6m by 6m,

how many slabs will they need?

Some slabs have been drawn
in place on the diagram.
[3J Copy and complete this table
for square ponds of different sizes.

length of each number of
side of pond slabs needed
1m
2m
3m
4m
5m
6m

@] Using the pattern in [3], decide how many slabs would be needed
for square ponds with sides these lengths.

a 10m b 20m

Explain how you worked out your answers.

~ Complete this operation box so that it gives the correct output for any input.

input output
length of each number of
side of pond slabs needed

50cm
CHALLENGE

50cm
• How many of slab A would you need to cover
the same area as the 1 m slabs around the pond in QJ ?
• Show how you work out your answers.
• What if you used slab B? 11 25cm
25cm

I STEPS 5:10 I