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Numerical Ability
Time Distance and Speed
. 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 min
Read Solution (Total 7)
-
- Speed=15kmph
time taken=20m or 1/3hr
Distance=15/3=5km
To cover 5 km in 15 minutes(or 1/4hr), it takes 20 kmph(5*4/1) - 13 years agoHelpfull: Yes(20) No(3)
- 1) time =20mins,speed=15kmph=15*(5/18)=25/6 m/sec
distance=20*(25/6)=250/3 m
then 2) given as time =15min
speed=250/3*15=(50/9)*(18/5)kmph=20kmph
- 13 years agoHelpfull: Yes(13) No(3)
- distance = speed * time.
in this case distance is constant.
so, final speed*15=15*20
then final speed =20kmph - 9 years agoHelpfull: Yes(2) No(0)
- distance=>
20*15= 15*x
x= (20*15)/15
x=20kmph - 7 years agoHelpfull: Yes(1) No(0)
- let, distance= x
x/(20*60) m/sec= 15*5/18 m/sec
x= 15*5*20*60/18, x=5000m - 9 years agoHelpfull: Yes(0) No(8)
- case1:
distance = speed x time= 15 x 20/60 =5km
case2:
speed= distance/time = 5/(15/60) 20kmph - 8 years agoHelpfull: Yes(0) No(0)
- Distance = Speed * Time ,
Distance same
Case I
Speed (s1) = 15 and Time (t1) = 20
case II
Speed = s2 and Time(t2) = 15
so s1 * t1 = s2 * t2
15 * 20 = s2 * 15
s2 = 20 kmph
- 8 years agoHelpfull: Yes(0) No(0)
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