Question

A CAR TRAVELS ALONG A STRAIGHT LINE FROM FIRST HALF TIME WITH A SPEED OF 40 km/h AND SECOND HALF TIME WITH A SPEED OF 50 km/h . THE MEAN SPEED OF CAR IS

Answer 1

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ANSWER TO UR QUESTION-

$speed \: of \: car \: in \: first \: half \: time = 40 \: km \: per \: hr \\ \\ so \: distance \: travelled \: in \: first \: one \: hour = 40 \: km \\ speed \: of \: car \: in \: second \: half \: time = 50 \: km \: per \: hr \\ so \: distance \: travelled \: in \: second \: hour = 50 \: km \\ total \: distance \: travelled \: in \: two \: hours =(40 + 50) \: km = 90 \: km \\ time = 2 \: hrs \: \\ \\ we \: know \: that \\ speed = distance\time \\ mean \: speed \: of \: car = 90\2 = 45 \: km \: per \: hr$

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Answer 2

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