# Mathematics

A closed rectangular tank 180cm height, 300cm long and 200cm wide is made of metal sheet which cost #8.50 per square metre. Calculate the cost of metal sheet used in making the tank.

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1. 180cm height, 300cm long and 200cm
= 1.8 m by 3 m by 2 m
So the surface area = 2(1.8)(3) + 2(1.8)(2) + 2(3)(2) m^2
= ....
multiply this by \$8.50 to get the cost

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