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Question

Find 7/12 of 2 km 16m + 2/3 of 40 m 5 cm

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Solution

Consider the following expression. 712 of 2 km 16 m +23 of 40 m 5 cm First convert 2 km 16 m and 40 m 5 cm in meters only.Note that 1 km=1000m, 1 cm=1100 mThis implies that, 2 km 16 m=2×1000 m+16 m =2000 m+16 m =2016 mand 40 m 5 cm=40 m+5100 m =40 m+120 m =800 +1 20 m =801 20 mSo the given expression becomes =712× 2016 m +23×801 20 m =7× 168 m +267 10 m =1176 m +26.7 m =1202.7 m

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