self
Maths Puzzle
A car covers 15 km in 12 minutes. If we decrease the speed by 5 km/hr,
then in how much time will the same car cover the same distance?
Read Solution (Total 3)
-
- D=15kms T=12/60hrs=1/5hrs
s=D/T;s=75kmph
now new speed=70km/hr,d=15kms
t=d/s
t=15/70=3/14hours - 12 years agoHelpfull: Yes(4) No(0)
- d is constant
thus v1*t1=v2*t2
15*12=10*x
or x=18mins. - 12 years agoHelpfull: Yes(2) No(2)
- it is 14
1x/5=15
x=75
now 75-5=70km/h
so 1/5*70=14min - 12 years agoHelpfull: Yes(0) No(0)
self Other Question