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The area of four walls of a room to be painted of sides 3cm, 5cm and 7cm is

a) 142cm2

b) 105cm2 c) 112 cm2
By Kylie

The area of four walls of a room to be painted of sides 3cm, 5cm and 7cm is

a) 142cm2

b) 105cm2 c) 112 cm2

d) 30 cm2​

About the author
Kylie


(a) 50ml water is added to 50m
solution of copper sulphate.
​

C.How is energy transtormed in the following
Mechanical
1. Electric fan =
2. flashlight =
3. battery-operated

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