Question

Question: 7
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A cyclist moving at a speed of 20 km/hr crosses a bridge in 2 minutes What is the length of the bridge?​

Answer 1

Answer:

2/3 km

Step-by-step explanation:

Speed = 20 km/hr = 20 km/60 min = 1/3 km/min.

Time taken = 2 minutes.

Therefore, Distance traveled = Length of Bridge = Speed*Time = 1/3*2                                  

                                                                                                         = 2/3 km

Answer 2

SPEED = DISTANCE/ TIME

1 hour= 60 min

Here length of the bridge= distance covered

SPEED= 20 KM/hr.

TIME= 2 minutes

         =1/30 hour

DISTANCE= SPEED * TIME

                  = 20 km* (1/30)

                  = 2/3 km

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