A) 610 \[{{m}^{2}}\]
B) 640 \[{{m}^{2}}\]
C) 650 \[{{m}^{2}}\]
D) 620 \[{{m}^{2}}\]
Correct Answer: B
Solution :
(b): surface area \[=2\left( lb+bh+lh \right)\] \[=2\left( 25\times 10+10\times 2+25\times 2 \right)\] \[=2\left( 250+20+50 \right)\] = 640
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