Answer:
1).hey mate here is your answer. =6m/s. So 6m/s is your answer.
2).A girl has to cover a distance of 400 km in 5 hours. She traveled for some time at a speed of 85 km/hr and the remaining time at the speed of 55 km/ hr. How long did she travel at high speed?
Total distance = 400 km
Total time = 5 hrs
Let her move at high speed = X hrs
Time for which moved at lower speed =5-X hr
Distance covered at high speed = 85xX=85X km
Distance covered at lower speed =55x(5-X) =275–55X km
Hence 85X+275–55X=400
30X=125. Hence X=125/30=25/6=4 1/6 hrs
Time for which she moved at high speed
=4 1/6 hrs
3).8 cm
5 cm
.20cm
20 cm
Explanation:
Yan Sana makatulong
