You need to find the total distance and the total time. The total distance is two times the distance to school, 2d.s=d/t=>t=d/sWhere s is speed, d is distance and t is time. So the time taken to get to school is:d/s1and the time taken to get back is:d/s2so the total time is:d/s1+d/s2=d(1/s1+1/s2)So, as speed = distance/time, divide the total distance by the total time:2d/d(1/s1+1/s2)=2/(1/s1+1/s2)=2/(1/20+1/40)=80/3≈26.7km/hr
Answer:
1.85 grams
Step-by-step explanation:
1 milligram is equal to 0.01 gram
so 1850 should be equal to 1.85 grams
Answer:
Xs=t
Step-by-step explanation:
x=amount per ticket
s=amount of tickets
t=total cost
Answer:
YZ = 13 units
Step-by-step explanation:
By intersecting chords theorem in a circle,
YA × AZ = WA × AX
By substituting the values of each segment in the formula,
10 × AZ = 6 × 5
AZ =
AZ = 3 units
Therefore, YZ = AZ + AY
YZ = 3 + 10
YZ = 13 units