A truck is 8 meters long. If 12 trucks like that can stand in a line on a bridge, then estimate the length of the bridge.

50 meters

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100 meters

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150 meters

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200 meters

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Solution

The correct option is B 100 meters
To estimate the length of the bridge we need to multiply the length of a truck to the total number of trucks
One truck = 8 m
8 m can be rounded off to 10 m
12 such trucks can stand on the bridge so 12 trucks can be rounded off to 10 trucks
Length of the bridge = 10 x 10 = 100 meters

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