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
15443 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

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

1 Answers

What is circuit switching?

0 Answers

What do you mean by Frequency re-use?

1 Answers

Explain when a sample of germanium and silicon having same impurity density are kept at room temperature then resistivity of silicon will be higher than that of germanium, why?

0 Answers

1.what is the purpose of zenar diode? 2.what is the difference between BJT and FET?

4 Answers Wipro,

Hi...........i want to know the pattern for written test for the post of Jr.Executive(Electronics) in AAI(Airports Authority Of India).Kindly send me the same.My email id Is zeenaz.786@gmail.com.

0 Answers AAI Airports Authority Of India,

how many types of thyristor are? shortly define them with purpose, application & working principle?

0 Answers

Give condition for conduction of UJT?

1 Answers TATA,

What are edge triggered flip flop and level triggered flip flop? How do they differ from one another?

0 Answers

which sort of communication is better for distant commn? AM or FM? why

6 Answers Cisco,

what is receiver device in ir receiver which catch over signal of ir?

0 Answers HCL,

telecom rf engineer

0 Answers Airtel,

For more Electronics Communications Interview Questions Click Here