Question

Meera drop her car at certain speed for first 4 hrs and increase its speed by 8 km for the next 5 hrs .if the total distance travelled by her was 400 km then find the speed at wich meera drove her car at different times


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Answer 1

Answer:

let speed of Car -x

t1 - 4hr

s1-x

d1-x×4

4x

t2-5hr

s2-x+8

dw-(x+8)×5

dw+d2- 400

4x+5x+40 - 400

9x- 400-40

9x - 360

x -40

x+8 -48