AAI ATC Junior Executive 27 Jul 2022 Shift 3 Paper

Rohan started from home to school at 9 a.m.on bicycle. His brother started for office at 10:15 a.m. on scooter in the same direction and caught up with him at 12:30 p.m. If Rohan’s speed is 12 km/h, then what is his brother’s speed?