Question

Sobha drove her car at a certain speed for the first 4 hours and increased its speed
by 10 km/hr for the next two hours. If the total distance travelled by her was 500
km., find the speeds at which Sobha drove her car at different times.​

Answer 1

Answer:

Speed in first 4 hours  = 80 km/Hr

Speed in next 2 hrs = 90 km/hr

Sobha drove her car at a certain speed for the first 4 hours and increased its speed by 10km./hr. for the next two hours. If the total distance travelled by her was 500km.

Let say speed in first 4 hrs = S km/Hr

Then Speed in next 2 hrs = S + 10 km/Hr

Distance = Speed * Time

Distnace in 1st 4 hrs = 4S km

Distance in next 2 hrs = 2(S +10) = 2S + 20 km

4S + 2S + 20 = 500

=> 6S = 480

=> S = 80

S + 10 = 90

Speed in first 4 hours  = 80 km/Hr

Speed in next 2 hrs = 90 km/hr

Step-by-step explanation:

Answer 2

Answer:

the answer is 80 kmph