points A and B are 90km apart on a highway one car start from A and another feom B at same time if the cars travels in the same direction at definate speed they meet each other at 9 hours. if the the car travels toward each other they meet in 9/7 hours. find the speed of two cars.
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the speed of car starting from A be x kilometres per hour and that of the car starting from B be y kilometres per hour
distwo cars is 90 km if the travel in the same direction give me after 9 hours
distance for A= speed × time
distance= 9x
distance for B = speed×time
=9y
9x-9y=90
x-y=10 ...diviving by 9..(1)
if the travel towards each other the total distance travelled by them will be 90 km
in 9 by 7 hours The distance travelled by the car starting from A is equal to x kilometre and that by the car from B is equal to y kilometre
x+y=9\7..(2)
from (1) and (2)
x=158\7
y=88\7
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