Buses ply from city A to city B at regular interval of 15 minutes. Every bus from A to B moves with constan speed 40 km/h. A car X moving from city B to city A meets buses at an interval of 5 minutes. The speed the car X is n × 10 km/h. Find the value of n.
Answers
Answered by
23
Explanation:
Given:- Buses ply from city A to city B at regular interval of 15 minutes.
Every bus from A to B moves with constan speed 40 km/h.
let the moving car from city B to city A = x,
A meets buses at an interval of 5 minutes.
The speed the car X is n × 10 km/h
Speed = Distance / time,
The speed the car X = 10 km/h,
Distance = speed × time,
Distance = 40 × 15,
Distance = 600km.
the distance between City a to city b is equal to 600 km.
= n × 10 = 600
n = 600/10
n = 60 Ans.
Answered by
7
Answer:
8
Explanation:
See, The distance between each bus is constant because it is given that time between each bus is constant.
Distance travelled in 15 minutes by bus = 40/4 = 10 KM
Speed of car = 10n Km/h
Speed of Bus = 40 Km/h
Imagine the buses are still.
Take relative Speed of car = 10n+40 Km/h
Time between meeting each bus = 1/12 hour
Distance between each bus = 10 Km/h
Distance / Speed = Time
10/10n+40 = 1/12
10n + 40 = 120
10 n = 80
n = 8
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