Question

A car moves with a speed of 30km/h for half an hour, 25 km for 1hour and 40km/h for 2hours. calculate the average speed of car

Answer 1

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✯♦given that , speed of car 30km/h for half an hour , 25 km for 1hour and 40km/h for 2hour.

▶so for calculate the average speed of car we can use the formula

♦ Distance = Speed*Time

so, in 1st Case = 30*1/2 = 15km

2nd Case = 25*1 = 25km

3rd case = 40*2 = 80km

Total Distance Travelled = 15+25+80 = 120km

Total Time = 1/2+1+2 = 7/2

▶Average Speed = 120/ 7/2 = 120*2/7 = 240/7 km/h

♦Or 34.28 km/h

$hence \: 34.28km/h \: is \: \: th e \: answer$
$hope \: it \: helps$
!!✌✌#BRAINLY

Answer 2

♦given that , speed of car 30km/h for half an hour , 25 km for 1hour and 40km/h for 2hour.

▶so for calculate the average speed of car we can use the formula

♦ Distance = Speed*Time

so, in 1st Case = 30*1/2 = 15km

2nd Case = 25*1 = 25km

3rd case = 40*2 = 80km

Total Distance Travelled = 15+25+80 = 120km

Total Time = 1/2+1+2 = 7/2

▶Average Speed = 120/ 7/2 = 120*2/7 = 240/7 km/h

♦Or 34.28 km/h