The volume of a cube is 125 cm3. The surface area of the cube is AND If A’s salary is 20% less than B’s salary, by how much percent B’s salary more than A’s?

5. If A’s salary is 20% less than B’s salary, by how much percent B’s salary more than A’s?

A. 24%

B. 25%

C. 20%

D. 22%

ANS: B

EXPLANATION:

[20/(100-20)] × 100 =[ 20/80]×100=25%

6. The volume of a cube is 125 cm^3. The surface area of the cube is

A. 625 cm²

B. 125 cm²

C. 150 cm²

D. 100 cm²

ANS: C

EXPLANATION:

a³=125

a=5

Surface area = 6a²=6×25=150cm²

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