A boy walking at the rate of 10 km per hour crosses the bridge in 15 minutes. The length of the bridge in meters isA)2000mB)2500mC)2250mD)3000m
Question
A boy walking at the rate of 10 km per hour crosses the bridge in 15 minutes. The length of the bridge in meters is
A) 2000m
B) 2500m
C) 2250m
D) 3000m
Solution
To solve this problem, we need to convert everything to the same units.
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First, we convert the speed from km/h to m/min. We know that 1 km = 1000 m and 1 hour = 60 minutes. So, 10 km/h = 10 * 1000 m / 60 min = 166.67 m/min.
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Next, we find out how far the boy can walk in 15 minutes at this speed. We do this by multiplying the speed by the time: 166.67 m/min * 15 min = 2500 m.
So, the length of the bridge is 2500 meters. The correct answer is B) 2500m.
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