Question

4. How many cm sq of cardboard is needed to make a closed rectangular
box 10 cm long, 7 cm
wide and 5 cm high ?
​

Answer 1

Step-by-step explanation:

TSA=2(lb+bh+hl)

=2(10×7+7×5+5×10)

=2(70+35+50)

=2(155)

=310

Answer 2

Answer:

Step-by-step explanation:

we know that TSA of cuboid = 2lb + 2bh + 2hl

     Here;

              l = 10

             b = 7

             h = 5

   so TSA = 2(10)(7) + 2(7)(5) + 2(5)(10)

                = 140 + 70 + 100

                = 310

  HOPE IT HELPS !!!!!!!!!!!!!!!!!