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 cm3. 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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