Question

A car drives for 1 hour 55 minutes with a constant speed of 36 km/h and then for another 1 hour 50 minutes with a constant speed of 72 km/h. What distance did it go?

Answer 1

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Convert hours to minutes
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1 hour 55 mins = 60 + 55 = 115 mins
1 hour 50 mins = 60 + 50 = 110 mins

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Speed = 36/h
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1 hour = 36 km

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Rewrite 1 hour as 60 mins
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60 mins = 36 km

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Find 1 min
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1 min = 36 ÷ 60
1 min = 0.6 km

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Find 115 mins
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1 min = 0.6 km
115 min = 0.6 x 115 
115 min = 69km

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Speed = 72km/h
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1 hour = 72 km

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Write 1 hour as 60 mins
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60 mins = 72 km

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Find 1 min
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1 min = 72 ÷ 60 
1 min = 1.2 km

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Find 110 min
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1 min = 1.2 km
110 min = 1.2 x 110 
110 min = 132 km

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Total Distance traveled:
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69km + 132km = 201km

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Answer: 201 km
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