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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 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 |
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