Arithmetic Aptitude :: Chain Rule
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A flagstaff 17.5 m high casts a shadow of length 40.25 m. The height of the building, which casts a shadow of length 28.75 m under similar conditions will be:
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In a camp, there is a meal for 120 men or 200 children. If 150 children have taken the meal, how many men will be catered to with remaining meal?
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An industrial loom weaves 0.128 metres of cloth every second. Approximately, how many seconds will it take for the loom to weave 25 metres of cloth?
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36 men can complete a piece of work in 18 days. In how many days will 27 men complete the same work?
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4 mat-weavers can weave 4 mats in 4 days. At the same rate, how many mats would be woven by 8 mat-weavers in 8 days?
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40.25 : 28.75 :: 17.5 : x 
40.25 x x = 28.75 x 17.5
x = 12.5
120 men.