a rectangular block has a square base of area 49cm square its height is 10 cm find its total surface area

Answer 1

If the base is a square of area 49, then each side is 7 cm
so look at the block, you have 2 squares + 4 equal surfaces on the sides
Surface area = 2(49) + 4(7)(10)
= 378 cm^2

btw, I don't understand your previous post, it looks incomplete

Answer 2

thanks for help.now i can understand it