Please answer 3. the mass per unit area of a type of plastic sheet is 2kg per m². state the rate in g per 100 cm²

4. a rubber plantation uses fertiliser at a rate of 250kg per hectare. state the rate of fertiliser consumption in g per m². [ 1 hectare = 10 000m² ]

Step-by-step explanation:

2kg/m² convert to g/100cm²

1 kg=1000 g

2kg=  ???

2*1000=2000kg

m      ⇒      100cm

m²     ⇒      10000 cm²

2kg/m²=2*1000/(10000/100) cm²

=2000/100 cm²

250*1000=250000

1 hectare=10000 m²

250000/10000 g/m²

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

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