2 men at same tym start walking towards each other from A n
B 72 kms apart. sp of A is 4kmph.Sp of B is 2 kmph in 1st
hr,2.5 in 2nd, 3 in rd. n so on…when will they meet i in 7
hrs ii at 35 kms from A iii in 10 hrs iv midway
Answers were Sorted based on User's Feedback
Answer / somy
midway.
72/2 = 36kms.....the distance midway
A to cover 36 takes 9hrs (9*4)
B in 9 hrs cover 36 also (2+2.5+....+6 = 36)
hence midway
Is This Answer Correct ? | 122 Yes | 5 No |
Answer / rana
Distance covered by A in 9hours= 9*4=36kms
Distance covered by B in 9 hours=
(2.5+3+3.5+4+4.5+5+5.5+6)=36kms
so A,B meet in the midway i.e 72/2=36kms
Tank you
Is This Answer Correct ? | 46 Yes | 4 No |
Answer / deepak
After the first hour, they are
4+2=6 km closer to each other. After the second hour, they are
4+2.5=6.5 km closer to each other, and so on. The reduction of distance per hour is therefore an arithmetic progression:
6, 6.5, 7, ...
with initial value a=6 and common difference d=0.5.
The arithmetic series (adding these distances) can be expressed in terms of hours, h, as
S(h) = ah + dh(h-1)/2
= 6h + 0.5(h^2-h)/2
= 6h + (h^2-h)/4
and they meet when this sum equals 72:
6h + (h^2-h)/4 = 72
24h + h^2 - h = 288
h^2 + 23h - 288 = 0
(h - 9) (h + 32) = 0
We have no interest in a negative solution, so the positive one h=9 is the one we want. They meet after 9 hours.
That doesn't match either of the answers that are times, so let's check the distance from A, which at a steady 4 km/h is clearly 36km, half the total distance.
They meet midway (answer iv).
Is This Answer Correct ? | 7 Yes | 4 No |
Answer / dinesh
after 8 hours
because after 8 hours A has traveled 32 km,
and B has travelde 30 km,
at that time the meet
Is This Answer Correct ? | 17 Yes | 62 No |
Find the correct meaning of the following phrase: A man of straw
1@2=8,3@5=323,4@5=?
Rearrange BBIRAT
If you had an infinite supply of water and a 5 quart and 3 quart pail, how would you measure exactly 4 quarts?
A person runs 6 ft in 1/4 sec. how much it will run in 10 sec.
The base 5 representation of the decimal number 2048 is _____.
A sequence is given. You should find out error & write correct answer. 1 2 5 10 13 26 29 48.
Plz send me SBI PB and clerical Questions Papers
0 Answers State Bank Of India SBI,
How many four digit numbers can be formed using the digits 1, 2, 3, 4, 5 (but with repetition) that are divisible by 4? Can you help Alok find the answer? a) 100 b) 125 c) 75 d) 85
f 9 examiners can examine a certain number of answer books in 12 days , working 5 hours a day ; for how many hours a day would four examiners have to work in order to examine twice the number of answer books in 30 days ?
4 Answers Banking, Sutherland,
5) Failure to use null indicator variable when referencing a nullable column will give the following SQLCODE a) +150 b) –001 c) +276 d) +305
pls send me sbi clerical post model papres of all sections
2 Answers State Bank Of India SBI,