Brain teaser

A Piece of wood in the form of a cuboid 5" × 8" × 13" has all its six faces painted pink. If the wooden block is cut into 520 cubes of 1" × 1" × 1", how many of these would have pink paint on them?

Replies (8)
There would be 418 cubes painted pink

No. Its wrong answer

322 cubes will have atleast one face painted in pink colour.

Is it 336??

Originally posted by : Pacer

322 cubes will have atleast one face painted in pink colour.


biNGOOOOOOOO yes

Originally posted by : Sushil poudel
There would be 418 cubes painted pink


THIS IS THE CORRECT ANSWER...

EXPLANATION:

THERE ARE SIX LATERAL FACES:

TWO FACES OF DIMENSION : 5 * 8

TWO FACES OF DIMENSION : 5 * 13

TWO FACES OF DIMENSION : 8 * 13

SURFACE AREA OF ABOVE FACES WOULD BE ((5X8)+(5X13)+(8X13)) x 2 = 418

Dear Jiju.... If u take one side surface, u cant take that portion on other side.. u have to leave that portion

Okay...

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