Please help me in solving que no.31.......I will make you brainlist
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two cars are moving in same direction and towards each other
so let the speed of cars be =x & y
if they move in same direction
then speed = x-y
if they move towards each other then the speed =x+y
according to the question
7(x-y)=70
x-y = 10 _____ 1
and
x+y =70 ______ 2
on elaminating the equation 1 and 2
x-y = 10
x+y = 70
_______
-2y = -60
y = 30
put value of y in eq 1
x-y= 10
x-30= 10
x = 40
so the speed of car A = 40km/hr
and car B = 30 km/hr
so let the speed of cars be =x & y
if they move in same direction
then speed = x-y
if they move towards each other then the speed =x+y
according to the question
7(x-y)=70
x-y = 10 _____ 1
and
x+y =70 ______ 2
on elaminating the equation 1 and 2
x-y = 10
x+y = 70
_______
-2y = -60
y = 30
put value of y in eq 1
x-y= 10
x-30= 10
x = 40
so the speed of car A = 40km/hr
and car B = 30 km/hr
mehurahil:
rajsthan , bhilwara
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