Xiaowen wants to send a gift to Xiaofang for her birthday. The gift is put in a cuboid box of 25cm long, 15cm wide and 20cm high (1) If you want to wrap the box with wrapping paper, at least how many square centimeters of wrapping paper should be used? (150 square centimeters of wrapping paper should be reserved at the folding edge) (2) If you want to tie up the gift box with ribbon and use 50cm ribbon at the knot, how many centimeters of ribbon do you need?

Xiaowen wants to send a gift to Xiaofang for her birthday. The gift is put in a cuboid box of 25cm long, 15cm wide and 20cm high (1) If you want to wrap the box with wrapping paper, at least how many square centimeters of wrapping paper should be used? (150 square centimeters of wrapping paper should be reserved at the folding edge) (2) If you want to tie up the gift box with ribbon and use 50cm ribbon at the knot, how many centimeters of ribbon do you need?

1
25*15*2=750
25*20*2=1000
20*15*2=600
The sum of the three numbers is the surface area of the box, which is 2350 square centimeters
Plus 150 square centimeters reserved is the answer, 2500 square centimeters
2
(25 plus 20) * 2 = 90
(15 plus 20) * 2 = 70
90 + 70 + 50 * 2 = 260 cm