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Question

According to the road map that Rashmi has, 1 cm on the map equals to 18 km on road. If she covers a distance of 72 km on road, what distance does she cover on the map?


A

4 cm

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B

6 cm

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C

9 cm

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D

8.2 cm

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Solution

The correct option is A

4 cm


Let us assume that Rashmi covers a distance of x cm on the map.


The scale and distance in kilometre are directly proportional to each other. So,

AB= Constant
where,
A = distance in cm
B = distance in km

A1B1 = A2B2

18x = 72

x = 7218 = 4 cm


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