In a km race A beats B by 28metres or 7 sec. find A's time over the course?

• In a km race A beats B by 28metres or 7 sec.
  
  It means B covers 28 mtr in 7 secs or 4 mtr /sec.
  B covers 1 km or 1000 mtr in 1000/4 = 250 secs.
  A covers 1 km in 250-7 = 243 secs.
  A's speed per sec = 1000/243 mtrs /sec = 4.115 mtr/sec
• 12 years agoHelpfull: Yes(13) No(6)
• A takes 28m in 7sec
  so 1000m in 250sec that means 4min 10sec
  but A reaches 7sec early so ans is 4min 3sec=243sec
• 11 years agoHelpfull: Yes(12) No(1)
• 57 minutes
  
  B would need 7 seconds to reach the destination. the total time will taken by B to complete the race will be (28/7) * 1000 = 66min 4 seconds
  
  A finished the race by 7 minutes earlier to B
• 12 years agoHelpfull: Yes(2) No(6)