R and S start walking forwards each other at 10a.m at speed of 3 km per hour and 4 km per hour respectively. They were initially 17.5 km apart. At what time do they meet?
2.30 p.m. | |
1.30 p.m | |
12.30 p.m | |
11.30 a.m |
2.30 p.m. | |
1.30 p.m | |
12.30 p.m | |
11.30 a.m |