Cars emerging from a motorway arrive at a junction that splits the road into two separate lanes. The number of cars per hour that continue in either lane is constant. If 70 cars per hour were diverted from the left lane to the right lane, the number of cars entering the right lane per hour would be twice as big as the number of cars entering the left lane per hour. Alternatively, if 70 cars per hour were diverted from the right lane to the left lane, the number of cars entering the left lane per hour would be four times as great as the number of cars entering the right lane per hour. How many cars enter the left lane per hour?	Choose the most appropriate option
A) 140  B) 170  C) 210  D) 265  E) 235
as per question 70 cars diverted from left lane to right lane. Thus we get equation R+70=2(L-70)   as per question 70 cars diverted from right lane to left lane .thus we get equation L+70=4(R-70)   by solving two equation i.e R +70 =2L-140 OR. R =2L -210 AND L+70= 4R -280 OR L= 4R -3500   170Y SOLVING WE GET L= 4( 2L -210) -350 OR L= 8L -840-350 OR 1190 =7L THUS L =170   170
<result>B</result>
Cars emerging from a motorway arrive at a junction that splits the road into two separate lanes. The number of cars per hour that continue in either lane is constant. If 70 cars per hour were diverted from the left lane to the right lane, the number of cars entering the right lane per hour would be twice as big as the number of cars entering the left lane per hour. Alternatively, if 70 cars per hour were diverted from the right lane to the left lane, the number of cars entering the left lane per hour would be four times as great as the number of cars entering the right lane per hour. How many cars enter the left lane per hour?