Area of 4 walls of a cuboid 400 sq cm, its length is 15 cm a

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Area of 4 walls of a cuboid 400 sq cm, its length is 15 cm and height is 8 cm. What is its breadth (in cm)?

[2017 SSC CGL 21 AUG S-3]

A 12

B 20,

C 24,

D 10,