In a trip, Ram can cover a distance of 200 km in 10 hours. First he started by Bike at the speed of 15 km/h. After that his bike broken down and cover the remaining distance by his friend's car at the speed of 25 km/h. Ratio between the distance covered by bike and car is ____________.
Explanation:
Let time travelled by bike = t hours, hence time travelled by car = 10 - t hours
Total distance travelled = t × 15 + (10 - t) × 25 = 200
⇒ -10t + 250 = 200
⇒ t = 5 hours.
∴ Distance travelled by bike = 5 × 15 = 75 kms and distance travelled by car = 200 - 75 = 125 kms
Ratio of distance travelled by bike and car = 75 : 125 = 3 : 5
Hence, option (a).
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