A person covers a distance of 52 km in 7 hrs . Some part of this journey is covered on foot at the speed of 7 km/hr and the rest by cycle at the speed of 8 km/hr. Find the distance covered on foot .
Answer & explanation
Correct answer: option 2
Distance = Speed × Time
Total Distance = 52 km
Total Time taken = 7 hours
Let the time he traveled on foot be x hours with speed 7 km/hr
And time he traveled by bicycle is ( 7 - x ) hours with speed 8 km/hr
According to question ,
7 × x + 8 × ( 7 - x ) = 52
7x + 56 - 8x = 52
x = 4 hours
So , distance traveled by foot = 7 × 4 = 28 km