Do now: These cuboids are all made from 1 cm cubes.Can you find their volumes and surface areas? State the units in your answers.
1 2 3
4 5 6
How well did you do? Did you show calculations ?
1 2 3
4 5 6
V = 1 x 2 x 4 = 8cm3 V = 2 x 2 x 4 = 16cm3V = 3 x 3 x 3 = 27cm3
V = 3 x 3 x 5 = 45cm3 V = 2 x 4 x 4 = 32cm3V = 4 x 4 x 2 = 32cm3
SA = 2 x 9 + 2 x 15 + 2 x 15= 78cm2
SA = 2 x 16 + 2 x 8 + 2 x 8= 64cm2
SA = 2 x 4 + 2 x 8 + 2 x 8= 40cm2
SA = 2 x 9 + 2 x 9 + 2 x 9= 54cm2
How well did you do? Did you show calculations ?
1 2 3
4 5 6
SA = 2 x 8 + 2 x 4 + 2 x 2= 28cm2
SA = 2 x 8 + 2 x 8 + 2 x 16= 64cm2
Extra challenge: Can you find the length, width and height of another cuboid that has a volume of 60cm3 ?
Challenge question 1:These two shapes each have a volume of 60cm3
Can you find the missing lengths?
1 2
?
6 cm
5 cm
?
3 cm 5 cm
3 x 5 x 4 = 60cm3
How well did you do? Did you solve these problems correctly, showing your calculations?
1 2
?
6 cm
5 cm
?
3 cm 5 cm
6 x 5 x 2 =60cm3
Challenge question 2:These two shapes have the same volume.
Can you find the missing length?
5 cm
4 cm
?
8 cm
4 cm 10 cm
How well did you do? Did you solve the problem correctly, showing your calculations?
5 cm
4 cm
?
8 cm
3 cm 10 cm
8 x 3 x 10 = 240cm3 4 x 5 x 12 =240cm3
How did you work out the answer?
