Interested to Buy Any Domain ? << Click Here >> for more details...
Jack & Jill went to the hill....In going to hill (upword
Direction)...Jack went to the hill first nd waited for Jill
for "x" hours.. Jack's speed was then twice of Jill.. In
the down word direction Jill can go 3km in a hour, while
Jack can go 1km in 1 hour.. Jill reach the ground 1st nd
waited for Jack for "x" hours.. Total journey they traveled
is 6 km.. Find the speed of Jack...
- 3 Answers
- 7100 Views
- CTS, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / bharath raj
previous ans wrong again..!!!!
first find x its 2 hours
total journey 6 hrs 3km up and also down
jill takes one hr to come down and jack takes 3 hrs so x
is 2 hours....
And while going up jack goes at 1.5km/hr and jill goes at
0.75 km hr so to travel 3 km they take 2 hrs and 4 hrs
respectively...!!! x again is 2 hrs...
so jack totally takes 5 hrs to travel 6 km
therfore speed is 6/5 km per hour
thats is 1.2 km per hour is the correct answer
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / khanijkumar
for jack
3=v*t; if his speed is v and time taken was t hours
For Jill
3=u*(x+t);
There fore
v*t=u(x+t)
2*u*t=u(x+t)
2t=x+t;
x=t;
In down word direction
jill speed 3km/hr
time taken by him to cover 3 kms is 1 hr;
time taken by Jack is 3 hr;
There fore jill wait 2 hr;
x=2;
There fore t=2;
v=3/2=1.5km/hr
There fore velocity of Jack is 1.5km/hr in the upword
direction
downward velocity is 1 km/hr
there fore
average speed is 2*1.5*1/(1.5+1)=1.2km/hr
| Is This Answer Correct ? | 1 Yes | 0 No |
If a car starts from A towards B with some velocity due to some problem in the engine after travelling 30km.If the car goes with 4/5 th of its actual velocity the car reaches B 45min later to the actual time. If the car engine fails after travelling 45km, the car reaches the destination B 36min late to the actual time , what is the initial velocity of car and what is the distance between A and B in km
Fill the empty slots. Three FOOTBALL teams are there. Given below the list of maches. played won lost draw Goals for Goals against A 2 2 *0 *0 *7 1 B 2 *0 *1 1 2 4 C 2 *0 *1 *1 3 7 the slots with stars are answers.
The average length of three tapes is 6800 feet. None of the tapes is less than 6400 feet. What is the greatest possible length of one of the other tapes?
Two persons start at the same point, walk in opposite directions with 5km/hr and 5.5km/hr respectively. What is the distance separated after 2 and half hrs?
in a school for a student out of a 100 he got 74 of average for 7 subjects and he got 79 marks in 8th subject. What is the average of all the subjects?
which mammal lives the longest besides man?
A 4 digit no may consist of the digits 6,2,7,5 where none of the nos are repeated.Find the possible no of combinations divisible by 36?
How many branches have?
19. Students from different universities. A speaks hindi and bengali. B hindi and english. C english and bengali. D tamil and hindi E bengali and tamil 20. Interpretor between C and D A only B only E only A ,B and E 21. Can't speak without interpretor B&E A&B A&C B&E
A report has 20 sheets each of 55 lines and each line consists of 65 characters. If this report is to be retyped with each sheet having 65 lines and each line of 75 characters wht will be the reduction percent in the pages ? (a) 22.5 % (b) 35 (c) 25 (d)none
ques-Input an array and prints the second minimum in an array?? Example Input:34,45,21,12,54,67,15 Output:15 I want a solution in C/C++ language
10 points are chosen on a plane. Every possible pair of points is joined by a line and the midpoint of the line is marked with red colour. What is the minimum possible number points on the plane which have been marked with red colour?
English 
