Question

please solve anyone(8,12,13) I will mark brainiest , but then only , when you will solve this correctly​

Answer 1

Answer:

8.

10 cm = 1 dm

Length = (95 + 2.5 +2.5) cm = 100 cm = 10 dm

Breadth = (75 + 2.5 + 2.5) cm = 80 cm = 8 dm

Height = (82 + 2.5 + 2.5) cm = 87 cm = 8.7 dm

TSA = 2(lb + bh + lh) = 2( 10*8 + 8*8.7 + 10*8.7) dm² = 2( 80 + 69.6 + 87) dm² = 2*236.6 dm² = 473.2 dm²

LSA = 2(l + b)h = 2*8.7(10+8) dm² = 17.4 * 18 dm² = 313.2 dm²

Cost (TSA) = 473.2 rupees

Cost (LSA) = 313.2 rupees

12.

TSA = 6*Side² = 294 cm²

— Side² = 294/6 cm² = 49 cm²

— Side = √49 cm² = 7 cm

Volume = Side³ = (7 cm)³ = 343 cm³

13.

Diagonal = Side * √2 = 12√3 cm

— Side = 12√3 / √2 cm = 4/√2 * 3√3 cm = 2√2 * 3√3 = 6√6 cm

Side = 6√6 cm

TSA = 6*(6√6 cm)² = 6*36*6 cm = 1296 cm²

Volume = (6√6 cm)³ = 216*6√6 cm³ = 1296√6 cm³