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Question
One student takes 20 mins to reach school if he goes at a 
speed of 15kmph .At what  speed should he go to  reach in 
15 mins ?
 Question Submitted By :: Sabarish
I also faced this Question!!     Rank Answer Posted By  
 
  Re: One student takes 20 mins to reach school if he goes at a speed of 15kmph .At what speed should he go to reach in 15 mins ?
Answer
# 1
ans: 20 kmph 

 let d be distance . 

  d / (1/3) = 15  thrfore .. d = 5km

 to travel 5 km in 15 min he must travel in speed of..

 5 / (1/4) = 20 kmph
 
Is This Answer Correct ?    2 Yes 0 No
Sabarish
 
  Re: One student takes 20 mins to reach school if he goes at a speed of 15kmph .At what speed should he go to reach in 15 mins ?
Answer
# 2
its definitely 20kmph............
 
Is This Answer Correct ?    0 Yes 0 No
Hari
 
 
 
  Re: One student takes 20 mins to reach school if he goes at a speed of 15kmph .At what speed should he go to reach in 15 mins ?
Answer
# 3
Distance = speed*time
                   =15*20/60(convert mins to hours)
                   =5 km
           
              
              Distance=5 km;
              time    =15/60(convert mins to hours)     
              speed   =distance/time
                      =5*15/60
                      =20 km/hr
 
Is This Answer Correct ?    0 Yes 0 No
Mari
 
  Re: One student takes 20 mins to reach school if he goes at a speed of 15kmph .At what speed should he go to reach in 15 mins ?
Answer
# 4
total 5km distance
5km in 15 min 
therefore 20kmph
 
Is This Answer Correct ?    0 Yes 0 No
S Chand
 
  Re: One student takes 20 mins to reach school if he goes at a speed of 15kmph .At what speed should he go to reach in 15 mins ?
Answer
# 5
Speed1 * time1=Speed2 * Time2
15 *20=x *15
Then,x=20kmph

Ans : 20kmph
 
Is This Answer Correct ?    0 Yes 0 No
Lavanya
 
  Re: One student takes 20 mins to reach school if he goes at a speed of 15kmph .At what speed should he go to reach in 15 mins ?
Answer
# 6
speed =15kmph
distance=speed*time
        =15*(20/60)=5km
speed=distance/time
     =5/(15/60)=20kmph
 
Is This Answer Correct ?    0 Yes 0 No
Sumathirajagopal
 

 
 
 
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