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A student cycles for xhours at 12km/hr and y hours at 16km/hr.Altogether,the student cycles 66km/hr in 5hrs.find the values of x
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Add 4+3=7 ,BOYS:4/7*X=12 X=21, GIRLS:3/7*21=3*21/7 GIRLS:9
Power=mgh/t power=350*0.2*10/10 Power=70W,note:we can not use gravity because his weight was given
Power=force * Velocity, 48kw=F*21,so F=48000/21=2285.7N
