Question

2 The shape of Greg's study is a rectangle 575 cm long by 325 cm wide.
a Work out the area of Greg's study in square metres.
Show how to use estimation to check your
your answer.
Flooring costs $52 per square metre.
It is only sold in whole numbers of square metres.
b How much will it cost Greg to buy flooring for his study?
Show how to use inverse operations to check your answer.​

Answer 1

Given : The shape of Greg's study is a rectangle 575 cm long by 325 cm wide.

To Find : Area of Greg's study in square metres.

Solution:

Greg's study is a rectangle 575 cm long by 325 cm wide.

100 cm = 1m

=> length = 575 cm = 5.75 m

   width = 325 cm = 3.25 cm

Area of rectangle = Length * breadth

= 5.75 * 3.25

= 18.6875 m²

≈ 19 cm²

5.75   is close to 6

3.25 is close to 3  

6 * 3 = 18     is close to   18.6875

Flooring cost = 19 * 52

= 988 Rs

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