After cutting off the height of a cuboid by 2 cm, we just get a cuboid with an edge length of 5 cm. What is the surface area of the original cuboid?

After cutting off the height of a cuboid by 2 cm, we just get a cuboid with an edge length of 5 cm. What is the surface area of the original cuboid?

After cutting the height of a cuboid by 2 cm, we just get a cuboid with an edge length of 5 cm. We can see that the length and width of the original cuboid are 5 cm, and the height is 5 + 2 = 7 cm
The original surface area of the cuboid is 5 × 5 × 2 + 7 × 5 × 4 = 190 square centimeters

() is 4 / 5 of 40; 40 is 1 / 5 of (); 1 / 4 more than 20 kg is () kg; 20 kg is 1 / 5 less than () kg

(32) is 4 / 5 of 40; 40 is 1 / 5 of (200); 1 / 4 more than 20 kg is (25) kg; 20 kg is 1 / 5 less than (25)

______ It's 45; & nbsp; & nbsp; of 40______ 45, 14 more than 20 kg______ Kg; 20 kg ratio______ Less than 15

(1) 40 × 45 = 32; (2) 40 ﹣ 45 = 50; (3) 20 + 20 × 14, = 20 + 5, = 25 (kg); (4) 20 ﹣ 15, = 20 ﹣ 45, = 25 (kg); so the answers are: 32, 50, 25, 25 kg

How many kilos is one fifth more than 40 kilos?

40×（1＋1／5）
=40×（6／5）
=48 (kg)
A: one fifth more than 40 kg is 48 kg