deepti

• Jul 5th, 2005

 

11.25kmph

zman

• Oct 26th, 2005

 

20kmph

Alfredo

• Nov 15th, 2005

 

answer --> 80 km/h

 80 Km --> 1h

 40 km --> 30 mins

 20 Km --> 15 mins. ==> the speed he should go to reach in 15 min. is 80 km/hs

xxx

• Jul 29th, 2006

 

1 hour=60 min.So,if a person walks with a speed 15kmph,then he covers 15km in 60 min. 

60 min------>15 km                                                                    

20min------->?     =(20*15)/60=5km. So,if this person needs to cover a distance of 5km in 15 min,his speed(per hour),   

15 min----->5 km

60 min----->?     =(60*5)/15   =20 km

so,he should cover 20 km in 60 min i.e., 20kmph

Ans: 20 kmph