(d) Ravi runs 8 times around a square field of side 60 m. His friend, Kumar, runs 5 times around a rectangular field of length 250 m and breadth 80 m. Who covers more distance? By how much?
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Answer: Ravi runs 60×4m around a square field in 1 time
Ravi runs 60×4×8 m =1920 m around a square field in 8 times
Kumar runs 2(250+80)m=660 m around a rectangular field in 1 time
Kumar runs 660×5m=3300m around a ractangular in 5 times
so Kumar covers more distance
(3300-1920)m =1380 m more
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Answer:
Ravi runs 60x4m around a square field in 1 time
Ravi runs 60×4×8 m =1920 m around a square field in 8 times
Kumar runs 2(250+80)m=660 m around a rectangular field in 1 time
Kumar runs 660×5m-3300m around a ractangular in 5 times
so Kumar covers more distance
(3300-1920)m =1380 m more
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