mahesh made a journey of 146km . he drives 2 hours in daylight and then for 1 hole1\2 in darkness at an average speed reduced by 10km/h from the daylight speed. find his speeds in daylight and in darkness respectively.
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distance distance covered in daylight=146km
time taken to cover the distance=2hrs
speed =distance÷time
speed =146÷2
=73km/h
distance cover in dark light=146-10
=136km
speed taken to cover the distance=1hole1/2=3/2hrs
speed =136÷3/2=90.6km/h
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