A car travels a certain distance taking 7 hrs in forward
journey, during the return journey increased speed
12km/hr takes the times 5 hrs.What is the distance travelled
Options Are :
10Kms
20Kms
30Kms
40Kms
- 12 Answers
- 25749 Views
- I also Faced
- E-Mail Answers
Answer Posted / thangamariappan
forward journey:
let speed be x km/hr and time be 7hrs
(i.e) Distance = speed * time => x*7=7x.....equ 1
Return journey:
speed increases by 12km/hr (ie) speed = x+12km/hr and
time =5 hrs
(i.e) Distance = speed * time => (x+12)*5=5x+60...equ 2
Equating 1 & 2 we get
7x=5x+60==> 2x=60=> x=30 means 30km/hr
Distance Travelled = speed * time ==> 30km/hr*7hrs=210 km
hence answer be 210 kms
| Is This Answer Correct ? | 8 Yes | 3 No |
Post New Answer View All Answers
"what category of job are you looking for and why"asked from an mep engineer.
There are two trees in a lawn. One grows at a rate 3/5 of the other in 4 years. If the total growth of trees What is the height of the smaller tree after 2 years
If x and x+10 are lengths containing right angle, what is the equation if area is 24 sq.cm
two trains are 2 kms apart. Speed of one train is 20m/s and the other train is running at 30 m/s. Lengths of the trains are 200 and 300m. In how much time do the trains cross each other?
There are following denominations of money: 1, 2, 5, 10, 20, 50, and 100 paise. Alex has as twice mony as David, who has as twice as Bindya, who again has as twice money as Charles. Each has two coins in hand. Which coins Bindya has?
Grass in lawn grows equally thick and in a uniform rate. It takes 24 days for 70 cows and 60 for 30 cows . How many cows can eat away the same in 96 days.?
A question on "set" theory.it was given that less than 30 persons in class.
In a 10 digit number, if the 1st digit number is the number of ones,2nd digit number is the number of twos, and ... so on. 10th digit is the number of zeroes,then find the number
Delhi's population is increasing day by day what is the reasong behind it & how can we solve it. G.D QUESTION (amit_nirwan@yahoo.com)
Work can be done by 8 men and 10 women in 25 days, the same work can be done by 10 children and 5 women . in how many days 2 children and 3 men can do the work?
During a given week an author spends 1/4 of his time preparing first drafts, 3/8 of his time editing the drafts and the rest of the time in preparing final drafts. If he works 48 hours during the week, how many hours did he spend in preparing final drafts?
hai frnds pls give me some tips and traps about HP software company interview for freshers.am a B.E CSE fresher.hoe will be the interview?how many days it will be conducted?how will be apps round?technical round?hr round?pls help me if any one known means.send me that pattern by vijay ,chennai
govern of irda,sebi and rbi
If "PROMPT" is coded as QSPLOS ,then "PLAYER" should be?
There is a rectangular terrace whose length and width are 60m X 20m. There is a walkway of uniform width around terrace. Area of walkway is 516m^2. Find width of walkway:
