A boy run for 10 minutes of a uniform speed of 9 km/h.At what speed should he run for next 20 minutes so that his speed comes to 12 km /h .
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30km/hr
d=3/2km
s=9km/hr
t=1/6hrs
t=1/3hrs
d=3/2km
s=3km/hr
d=3/2km
s=9km/hr
t=1/6hrs
t=1/3hrs
d=3/2km
s=3km/hr
agarwalshyam13parimw:
speed is 13.5 km/h
sorry,the answer was wrong
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