If a person walks at 28 km/hr instead of 20 km/hr, he would have walked 80 km more. The actual distance travelled by him is:
Explanation:
Let the actual distance travelled be x km.
Then, x20=x+8028
⇒ 28x = 20x + 1600
⇒8x = 1600
⇒ x = 200 km.
Hence, option (a)
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