Step-by-step explanation:
T.S.A.=2(lb+lh+bh)
2(25×15+25×12+15×12)
2×(375+280+180)
2×835
=1670cm²
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Step-by-step explanation:
T.S.A.=2(lb+lh+bh)
2(25×15+25×12+15×12)
2×(375+280+180)
2×835
=1670cm²