A person covers a certain distance with a speed of 18km /hr in 8 min.If he wants to cover the same distance in 6 min, what should be his speed?
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Answered by
9
18 km/hr in 8 min or 8/60 hr
that implies distance 18 x 2/15 =2.4 km
he needs to cover 2.4 km in 6min or 6/60 hr
we know time = distance/ speed
this implies 1/10=24/10x
so we have x=24 km/hr
Answered by
3
S1= 18 km/hr
t1= 8 min= (2/15)hr
D1= (18*2/15)km
= (12/5)km
D2=D1=(12/5)km
t2=6min=(1/10)hr
s2=(12/5)/(1/10)=
= 12*10/5 =24km/hr
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