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

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

Answer / ramesh

distance=time*velocity
7x=(x+12)5
x=30
then in one hour 30km distance travelled
then in 7 hours 210 kms

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

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

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.

Answer / ranjeet

Question is confusing. If spped is increased by 12km/hr . den ans will b 210.

"by" is missing.

Answer / k.praveena

30

Answer / guest

30 kms

Answer / ramesh komala

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

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