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प्रश्न
Length of a rectangular field is 250 m and width is 150 m. Anuradha runs around this field 3 times. How far did she run? How many times she should run around the field to cover a distance of 4 km?
उत्तर
Given, length of rectangular field `(l)` = 250 m
And width of rectangular field `(b)` = 150 m
Perimeter of the field = `2(l + b)` = 2(250 + 150) m = `2 xx 400` m = 800 m
∵ Distance covered in one round = Perimeter = 800 m
∴ Distance covered in three rounds = `3 xx 800` = 2400 m
Now, number of rounds to cover 4 km, i.e. 4000 m = `4000/800` = 5 .....[∵ 1 km = 1000 m]
Hence, she should run 5 times around the field around the field to cover the distance of 4 km.
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