The buses are departed after every 20 min and a man who was going away from the bus depot get the buses after every 24 min. Find the speed of buses if the speed of man is 30 km/hr.
Answer & explanation
Correct answer: option 4
The distance covered by bus in 4 minutes is equal to the distance covered by man in 24 minutes.
B : M
Time 4 : 24
Speed 24 : 4
Speed 6 : 1
↓ ↓
×30 ×30
↓ ↓
180 30