Biology, asked by maahiehadeeka11, 17 days ago

a) A car covers 25 kms in 10 minutes. Calculate its speed in m/s. b) If the same car given in part a) covers the same distance in same time what will be its speed in km/hr?​

Answers

Answered by PurvikaS
0

Answer:

a) 25 × 1000 = 25000

Therefore, 25000 m/s

b)Let the speed of the car be s and time be t

Then, st=240⟹s=t

240

and (s+20)(t−2)=240

(

t

240

+20)(t−2)=240

(20t+240)(t−2)=240t

20t

2

+240t−480−40t=240t

20t

2

−40t−480=0

t

2

−2t−24=0

t

2

−6t+4t−24=0

(t−6)(t+4)=0

t=−4,6

Hence, time is 6 hr

and speed =

6

240

=40km/hr

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