Model 3 Problems on average speed Section-Wise Topic Notes With Detailed Explanation And Example Questions

Question : 1

A man travels 50 km at speed 25 km/h and next 40 km at 20 km/ h and there after travels 90 km at 15 km/h. His average speed is :

a) 20 kmph.

b) 15 kmph.

c) 18 kmph.

d) 25 kmph.

Question : 2

Gautam travels 160 kms at 32 kmph and returns at 40 kmph. Then his average speed is

a) 36 kmph

b) 35.55 kmph

c) 72 kmph

d) 71.11 kmph

Question : 3

A man covers a total distance of 100 km on bicycle. For the first 2 hours, the speed was 20 km/ hr and for the rest of the journey, it came down to 10 km/hr. The average speed will be

a) 15$1/8$ km/hr

b) 20 km/hr

c) 12$1/2$ km/hr

d) 13 km/hr

Question : 4

To cover a distance of 216 km in 3.2 hours, what should be the average speed of the car in metre/second?

a) 37.5 metre/second

b) 18.75 metre/second

c) 67.5 metre/second

d) 33.75 metre/second

Question : 5

A person travels 600 km by train at 80km/hr, 800 km by ship at 40 km/hr 500 km by aeroplane at 400 km/hr and 100 km by car at 50km/hr. What is the average speed for the entire distance ?

a) 60$5/123$ km/hr

b) 62 km/hr

c) 65$5/123$ km/hr

d) 60 km/hr

Question : 6

Durga walks 5 km from her home to school in 60 minutes, then bicycles back to home along the same route at 15 km per hour. Her sister Smriti makes the same round trip, but does so at half of Durga's average speed. How much time does Smriti spend on her round trip ?

a) 160 minutes

b) 80 minutes

c) 120 minutes

d) 40 minutes