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### Grade 7 - Mathematics9.53 Word Problems on Cube

 Example: The total surface area of a cube is 4056 square metres. Find the length of its edge. Solution: Let the edge of the cube be l metres, Then we have the total surface area = 6l2 But we have given that the total surface area = 4056 square metres. \ 6l2 = 4056 Þ l2 = 4056/6 Þ l2 = 676 Taking square roots on both sides, we get Öl2 = Ö676 \ l = 26 \ The length of the edge of the cube = 26 metres. Directions: Solve the following problems. Also write at least ten examples of your own.
 Q 1: The total surface area of a cube is 1536 square metres. Find the length of its edge.15 metres14 metres16 metres13 metres Q 2: The total surface area of a cube is 1944 square metres. Find the length of its edge.18 metres19 metres20 metres21 metres Q 3: The total surface area of a cube is 486 square metres. Find the length of its edge.9 metres14 metres12 metres16 metres Q 4: The total surface area of a cube is 5046 square metres. Find the length of its edge.29 metres28 metres32 metres31 metres Q 5: The total surface area of a cube is 7776 square metres. Find the length of its edge.36 metres39 metres34 metres37 metres Q 6: The total surface area of a cube is 2906 square metres. Find the length of its edge.21 metres20 metres22 metres23 metres Question 7: This question is available to subscribers only! Question 8: This question is available to subscribers only!