Question

calculate the average speed of a motorist travels with the speed of 10 metre per second for 2 minutes and with 10 meter per second for the next 5 minutes

Answer 1

10*120+10*300=4200metre
total metre covered 4200/2=2100
total time 2+5=7min
avg speed 2100/7*60=5

Answer 2

Hello friend

_____________________________

As we all know that,

Average Speed = Total distance traveled/Total time taken..

We have,

S1 = 10m/s

S2 = 10m/s

T1 = 2minutes

T2 = 5minutes

So,we have to find the Distance of D1 and D2

D1 = S1/T1

D1. = 10/2

D1. = 5m

Similarly,

D2 = S2/T2

D2 = 10/5

D2 = 2m.

We have calculated both the distance.

Now,we have distance and time.

So we can easily find the average speed.

By applying the formula,

Average Speed = Total distance traveled/total time taken

A.S = 5 + 2/5+2

A.S = 7/7

A.S = 1m/s.

Therefore, the average speed of the motorists is 1m/s.

Thanks.

Any queries please ask frequently..okk