math

posted by .

a cyclist travels the 30 km from Town A to Town B at an average speed of 25 km/h and immediately continues the journey to town C, which is a further 60 km away at an average speed of 20 km/h.
What is the average speed for the whole journey?

• math -

total distance = 30+60 km
total time = 30/25 + 60/20 = 21/5 hr

avg speed = 90km ÷ 21/5 hr = 150/7 km/hr

• math -

4.2

Similar Questions

1. maths

A man travels from town a to b at an average speed of 90km/h.on his return journey he takes (one)1 hour less and his speed is 10km/h faster......1.how far apart are towns a and b, ............. ..2.what Is his average speed from town …
2. maths

THE DISTANCE BETWEEN A AND B IS 150KM.A CAR STARTS FROM A AT 10PM AND TRAVELS AT AN AVERAGE SPEED OF 80KM/H TOWARDS TOWN B.A TRANSIT LORRY TRAVELS FROM TOWN B AT 10:15AM TOWARDS TOWN A AT AN AVERAGE SPEED OF 40KM/H.AT WHAT TIME WILL …
3. math

Plz help me????? Carter left Town A at noon, driving toward Town B at an average speed of 50 mph. At 12:30 P.M., Max headed from Town B to Town A along the same road. At 3 P.M., they met each other along the way, and Carter realized
4. MATH

Carter left Town A at noon, driving toward Town B at an average speed of 50 mph. At 12:30 P.M., Max headed from Town B to Town A along the same road. At 3 P.M., they met each other along the way, and Carter realized that he had completed …
5. Math

Carter left town A at 8 a.m driving toward town B at an average speed of 60 mph. At 8:30 a.m, Mihn headed from town B to town A along the same road. At 11 a.m, they met each other along the way and Carter realized that he had completed …
6. maths

danny drove halfway from town p to town q at average speed of 60 km/h. he wants to average 80 km/h for the entire journey. What will his average speed be for the second part of his journey?
7. physics

suppose a car is driven from town A to town B from town B to town C and from town C to town D which have equal distances at average speeds 20km/hr,60km/hr and 120km/hr respectively,what is the average speed for the whole journey
8. statistics

suppose a car is driven from town A to town B from town B to town C and from town C to town D which have equal distances at average speeds 20km/hr,60km/hr and 120km/hr respectively,what is the average speed for the whole journey
9. Math

A van leaves town x at 6:45am and travels towards town y ,400km away at an average speed of 80km/hr.At 8:00am a truck left y for x at an average speed of 60 km/hr.at what time will the two meet.
10. Math

An aeroplane flies from town A(20°N,60°E) to townB (20°N,20°E) if the journey takes 6 hours Calculate correct to 3 significant figures, the average speed of the aeroplane If it then flies due north from town B to town C 420km away.calculate …

More Similar Questions