Math, asked by sangollamohithdon, 3 months ago

Find i) L.S.A ii) T.S.A iii) Volume and iv)length of diagonal of cuboids whose dimensions are

of 12m × 8m × 3m.​

Answers

Answered by harishyadavmuthyala2
1

Answer:

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Answered by XxmiragexX
58

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(i)2 \times (l + b) \times h \\  \\  \implies2 \times (12 + 8) \times 3 \\  \\  \implies 2 \times 20 \times 3 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\  \\  \implies 120 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:

So, LSA of cuboid = 120 cm²

(ii)2 \times (lb + bh + hl) \\  \\  \implies 2 \times (12 \times 8 +8 \times 3 + 3 \times 12) \\  \\  \implies 2 \times (96 + 24 + 36) \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\  \\  \implies 2 \times 156 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \\   \\  \implies 312 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:

So, TSA of cuboid = 312 cm²

(iii)lbh \\  \\  \implies 12 \times 8 \times 3 \\  \\  \implies 96 \times 3  \:  \:  \:  \:  \:  \:  \: \\  \\  \implies28 8 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:

so, volume of cuboid = 288 cm³

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