Correct Answer - Option 3 : 30
Given:
Speed of cycling = 10 km/hr
Speed of walking = 3 km/hr
Total time taken to cover 45 km = 8 hours
Concept used:
Distance = Speed × Time
Calculation:
Let the time for which Ramakant do cycling be x hr
Time for which Ramakant do walking = (8 - x) hr
According to the question,
⇒ 10 × x + 3 × (8 - x) = 45
⇒ 10x + 24 - 3x = 45
⇒ 7x = 21
⇒ x = 3 hr
Distance covered by cycle = (10 × 3) km/hr
⇒ 30 km/hr
∴ Required distance covered by cycle is 30