A room is 30 X 12 X 12. a spider is ont the middle of the
samller wall, 1 feet from the top, and a fly is ont he
middle of the opposite wall 1 feet from the bottom. what is
the min distance reqd for the spider to crawl to the fly.
- 4 Answers
- 13078 Views
- Cadence, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / imran
length is 30 breadth is 12 and height is 12
------------------------------
1
.------------------------------
1 .
1 .
1 10 .
1
1 .
1
1
1 30 .
-------------------------------.
1
consider right angled triangle
so the distance= square root of (30*30+10*10)
| Is This Answer Correct ? | 11 Yes | 4 No |
Answer / sarathchand
h=30; b=12; h=12;
..............
| " |
| |
| | 12
| |
| " |
|..............|
30
Apply Geometry to get the minimum distance.
Mid-point [A] of side wall is at 6.
Spider [B] is at 5 from Mid-point of side wall (or) 11 from bottom (or) 1 form top.
Center point [C] of box is 15 away form the mid-point of side wall.
Then ABC is a right angled triangle.
Sides AB=5; AC=15;
Angle at A=90 degrees
BC=((AB^2)+(AC^2))^1/2
BC=15.811
Similarly,
Mid-point[D] of ooposite sidewall is at 6.
Fly [E] is at 5 from Mid-point of opposite side wall (or) 11 from top (or) 1 form bottom.
Center point [C] of box is 15 away form the mid-point of opposite side wall.
Then DEC is a right angled triangle.
Sides DE=5; DC=15;
Angle at D=90 degrees
CE=((DE^2)+(DC^2))^1/2
CE=15.811
Shortest distance from B(Spider) to E(Fly)
BE = BC + CE
BE = 31.622
| Is This Answer Correct ? | 5 Yes | 2 No |
Answer / hitesh
Answer is 40.
1. We need to "flatten" the cuboid room(or open it up as a plane sheet i.e. how all 6 faces of cuboid can be opened up).
2. The question is asked about the shortest distance spider
can take to reach Fly by "CRAWLING".
As Sarathchand answered the shortest distance as 31.622, that means the spider must have the ability to "fly" to reach that Fly which unfortunately not mentioned in the porblem.
3. So, if we flatten the cuboid and join those 2 points(say A (spider and B Fly), you can get the distance as 40 by using right angle triangle property(for triangle ABC for 'flattened' or(Opened Up) cuboid.
Sqrt(32*32+24*24)=40.
In which base AC will be = 32 i.e.(1+30+1) where 1 is dist. from top to spider, 30 is length and 1 is dist. from bottom to Fly.
And height BC will be = 24 i.e. (6+12+6) where 6 is centre distance(Mid point) and 12 is one side.
When we flatten the cuboid it'll look like this(can't post the picture, no option available. I tried my best, I hope u can understand.)
____________
|____________|__ 12
|____________|B_| 12 (mid point 6) 6+
__|____________|1 12 12+
|_A|____________|C 12 (mid point 6) 6= 24 (=BC)
1 30
1+ 30+ 1= 32 (=AC)
| Is This Answer Correct ? | 1 Yes | 0 No |
All men of this party are republican . mohan is member of this party. mohan is republican is true or false or camn't say?
Bird is flying 120km/hr b/w b to r. Two trains at b to r at 60 kmph the distance traveled by the bird before it is killed.
There are two glasses A and B. A contains orange juice and B contains apple juice in same quantity. Some amount orange juice from glass A is transferred to glass B. The juice in glass B is mixed well. Then again the same amount of juice from B is transferred to A. Compare the quantities of apple juice in A and orange juice in B.
A person left house with speed 40 mile per hour his wife after 30 minutes left to catch him at a speed of 50. In what time she will catch?
1) In a club there are certain no. of males and females. If 15 females are absent then no. of males will be twice that of females. If 45 males are absent then female strength will be 5 times that of males. Find no. of males actually present.
A company installed 36 punching machines at the begining of the year.In the spring they installed 9 additional m/c's and then discontinued 18 in the fall.How many were still installed at the end of the year?
Hi, Can anybody please send me the last year question papers of Oriental Bank of Commerce PO exam. My email ID is: yamini.friend14@gmail.com Thanks.
the bucket size is 10KB.it takes 0.0001 KB/milisec to fill bucket.the bucket takes 100 or 1000 milisec to reach to destination.it takes 100 milisec to pass acknowledgement from dest to source.so calculate how much time will it take to pass N KB ,write formula. i don't remember the exact figures of bucket transmission time from source to dest
The first United States Solicitor General, Benjamin H. Bristow, __________________________ was born in 1832 and served in the Grant administration from 1874 to 1876. Earlier in his life, Bristow served as a lieutenant colonel in the 25th Kentucky Infantry was born in 1832 and had served in the Grant administration from 1874 to 1876. Earlier in his life, Bristow served as a lieutenant colonel born in 1832 and served in the Grant administration from 1874 to 1876. Earlier in his life, Bristow had served as a lieutenant colonel in the 25th Kentucky Infantry born in 1832 and appointee in the Grant administration from 1874 to 1875. Earlier in his life, Bristow served as a lieutenant colonel in the 25th Kentucky Infantry
What will be the next great improvement in search technology?
The equivalent compound ratio of 5:6::7:10::6:5
The Longest River in the World____________
English 
