Susan made a block with small cubes of 8 cubic cm volume to make a block ,3 sm

Susan made a block with small cubes of 8 cubic cm volume
to make a block ,3 small cubes long, 9 small cubes wide and
5 small cubes deep. She realizes that she has used more
small cubes than she really needed. She realized that she
could have glued a fewer number of cubes together to lock
like a block with same dimensions, if it were made hollow.
What is the minimum number of cubes that she needs to make
the block?
a) 114 b) 135 c) 21 d) 71

Question Posted / guest

3 Answers
15648 Views
TCS, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

Susan made a block with small cubes of 8 cubic cm volume to make a block ,3 small cubes long, 9 sm..

Answer / kamlesh

(9*3*5)-(9-2)*(3-2)*(5-2) = 114

Is This Answer Correct ?

41 Yes

2 No

Susan made a block with small cubes of 8 cubic cm volume to make a block ,3 small cubes long, 9 sm..

Answer / anil prakash

dimensions of cube =2*2*2cm^3

length = 3 small cubes long = 6cm

breadth = 9 small cubes long = 18cm

depth = 5 small cubes long = 10cm

volume = 6*18*10 = 1080cm^3
volume of hallow cube = (6-4)(18-4)(10-4) = 168cm^3

hence no.of cubes required = 1080-168/8 = 114

Is This Answer Correct ?

11 Yes

2 No

Susan made a block with small cubes of 8 cubic cm volume to make a block ,3 small cubes long, 9 sm..

Answer / kld

1st case when inner hollow part is of 1cube
(9*3*5)-(9-1)*(3-1)*(5-1)=71
2nd case when inner hollow part is of 2 cube
(9*3*5)-(9-2)*(3-2)*(5-2)=141

3rd case 3 cube never be happens thus ans may be a and d both.

Is This Answer Correct ?

2 Yes

17 No

Post New Answer

More Electronics Communications Interview Questions

Wats da diff b/w ithernet communication and profibus communication?

1 Answers

what is operating ratio in railway

1 Answers

Explain the difference between silicon controlled switch (scs) and gate turn-off switch (gto)?

1 Answers

Dear concern Plz provide me the solved papers of Railway section engineer in signal...

0 Answers

enlist, How many devices or components are use in circuits,PCB like power supply, UPS card, bus module card ,CP card?

1 Answers

please send previous years question papers of JuniorEngineer (ELectronics)in RRB.

1 Answers

What is the function of DISTRIBUTION TRANSFORMER?

2 Answers BPC,

Explain what are the factors which the measurement accuracy of q-meter?

1 Answers

WHAT IS THE DIFFERENCE BETWEEN B.E AND B.Tech? which is the better one to choose according to you?

3 Answers

Explain am and fm.

1 Answers

Which semiconductor device is used as a voltage regulator?

1 Answers

why we use low and high radio band in m/w link at both end

1 Answers Idea,

For more Electronics Communications Interview Questions Click Here