x an y are two truck parks 500 km apart, if a truck leaves park x at 9 a.m. and travels at a speed of 70 kmph at what time will the first truck meet the second truck which left station y at 10am and travels at a speed of 50 kmph Choose the correct choice from the following answers
A) 1.30 p.m
B) 2.30 p.m
C) 11.30 a.m
D) 12.30 p.m
E) 1.30 a.m
Suppose they meet x hours after 9 a.m.   Distance moved by first truck in x hours + distance moved by 2nd truck in x-1 hrs = 500   70x+50(x-1) = 500   70x+50x-50= 400   120x= 450   x = 4.5   So they meet 4.5 hr after 9 a.m. which is at 1.30 p.m.   1.30 p.mnswer is 1.30 p.m
<result>A</result>
x an y are two truck parks 500 km apart, if a truck leaves park x at 9 a.m. and travels at a speed of 70 kmph at what time will the first truck meet the second truck which left station y at 10am and travels at a speed of 50 kmph