Question

two cubes with 10cm edge are joined end to end find out the total surface area of the ​

Answer 1

Answer:

1000 sq.cm.

Explanation:

There is a cuboid is form

Therefore L=20 cm

T.S.A. = 2(lb)+2(bh)+2(lh)

= 2(20×10)+2(20×10)+2(10×10)

=400+400+200

=1000

Answer 2

Answer:1000 sq cm

Explanation:

TSA of cube = 6×squre of vertex

area of one cube = 6×100 =600

area of second cube = 6×100=600

sum of both cubes = 1200

but after joining both to each other

one face of both cube cover to each other

so,area of two face = 2 × 100=200

Hence, TSA of including both cubes =1200-200=1000 cubic cm