A plate of metal 1 cm thick, 9 cm broad and 18 cm long
is melted into a cube. Find the difference in surface,
area of the two correct to the nearest whole number.
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Step-by-step explanation:
surface area of plate 2(1x9) + 2(1x18) + 2(9x18)= 18 +36 + 324=378sq cm
volume of plate 1 x 9 x18=162cube cm
cube root of162= 5.4514 cm and thus one side of cube
surface area of cube is 6(5.4514 x 5.4514)= 30.21 sq cm x 6 sides= 178,31 sq area
area diff 378 sq cm- 178=200cm
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