I believe the answer is d
After 40 minutes, Ralph has already painted (40/60)/12=1/18 of the fence
Lisa's speed is 1/15 fence/hour, Ralph's speed is 1/12 fence/hour, hence when they help each other their combined speed is 1/15+1/12=3/20
Thus we need to solve 3/20*x=17/18 thus x=170/27 hours (approx 6 hours 15 mins)
Answer:
s= vt
Step-by-step explanation:
v= s/t = 60km/hr...(Criss cross)
s= vxt= vt
Answer:
W number - blank is 51.
Step-by-step explanation:
I don't understand what the question is. What is the number unless you want something random then here:
Blank - 52
a number = 1
52 - 1 = 51
