A piece of wood 2m and 30 cm long is marked off into 0.1 m lengths. How many 0.1 m lengths are there?
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Ответ дал:
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Area of big square.
A =200+30=230cm
Area =a^2
=230×230
Area of small square
A=0.1m=100cm
Area=a^2
=100×100
No.of mark = 230×230/10000
= 52900/10000
=5.29
Mark's
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