anybody please say me how to do Q5 step by step and in my book the answer is 46×2÷3
and please don't write unnecessary answer and get the points
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Step-by-step explanation:
1st 30 km uniform speed is (u1) = 40 km/hr
2nd 20km uniform speed is(u2)= 60km/hr
total distance= 50km
time taken in the first half=d/s=3/4hr =45min
time taken in the second half= 1/3hr=20mintotal time=65min= 13/12hr
average speed= 50/13/12
=50×12/13
=46.15 km/hr
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