Driver of an ambulance sees a school bus 60km ahead of him.After 30sec the school bus is 90kmbehind.If the speed of the ambulance is 38kmph,then What is the speed of school bus?
In an Elecetion between two candidates 10% voters listed on the voting list didn't vote.60 voters were rejected.If the successful candidate won by 308 votes and won supported by 47% of the voters listed on the voters list,then find the total number of valid votes?