Mother wants to make a TV hood which is 60cm long, 50cm wide and 45cm high. How long does it need to lace the front of the hood?

Mother wants to make a TV hood which is 60cm long, 50cm wide and 45cm high. How long does it need to lace the front of the hood?

(60 + 45) × 2, = 105 × 2, = 210 (CM); a: the length of lace is 210 cm

The sum of the edges of a cuboid is 104 cm long, 9 cm long and 7 cm wide. How high is it?

Sum of edge length = (length + width + height) * 4
So: length + width + height = 104 / 4 = 26 cm
So: height = 26-9-7 = 10 cm

The garden community has installed 50 new stools for residents. The length, width and height of the stools are 104cm, 44cm and 4.6cm respectively, and the length, width and height of the legs are 44cm and 44cm respectively

44*4.6*35*2=14168(cm2)
104*44*4.6=21049.6(cm2)
(14168+21048.6)*50=1760830(cm2)=1.76083m3
Right?