Question

What is the total surface area of the box whose dimensions are 4.2m×14cm× 8.4cm and each of whose sides is 7 cm​

Answer 1

Step-by-step explanation:

TSA of cuboid =2(lb+bh+hl)

2(4.2×14+14×8.4+8.4×4.2)

2(58.8+117.6+35.28)

2(211.68)

423.36cm²

TSA of cube

6a²

6(7²)

6(49)

294cm²