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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
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Answer / mohammed siddiqui
options are wrong, the correct answer is 210 km
s= d/7 forward (speed = dist/time)
s+12 = d/5 return journey
d/7 + 12 = d/5
d/7 - d/5 = -12
(5d - 7d)/35 = -12
-2d = -12x 35
d = 210
| Is This Answer Correct ? | 56 Yes | 15 No |
Answer / priyanka saraf
s= d/7 forward (speed = dist/time)
s+12 = d/5 return journey
7s=d == 5s+60=d
==> 7s=5s+60
==> s = 30
==> d = 7*s
= 7*30
= 210
| Is This Answer Correct ? | 29 Yes | 8 No |
Answer / 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 |
Answer / deepak kumar
In the question it is written "INCREASED SPEED" 12 km/hr not
the speed is increased by 12 km/hr,so during return journy
speed is 12 km/hr.
s=ut
s=12*5=60 during return
total distance=2*s=120
non of the options are correct
Question has some problem with grammer too
| Is This Answer Correct ? | 12 Yes | 12 No |
Answer / shaji varghese
This question is wrong for the options given.
If the question is "The speed of the car during the foreword journey" Then the Answer is 30 kms/hour.
The distance traveled is 210 Kms
The return journey speed is 42 kms/hour.
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / ranjeet
Question is confusing. If spped is increased by 12km/hr . den ans will b 210.
"by" is missing.
| Is This Answer Correct ? | 1 Yes | 1 No |
x*7=(x+12)*5 (dist = speed*time)
x=30km/h distance traveled in one direction so
both directions for 12 hours so
total distance is 12*30=360 km
| Is This Answer Correct ? | 3 Yes | 8 No |
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