Answer:
20(E)
Step-by-step explanation:
Printing press R, S and T are working together at their respective constant rate.
They can do a job for 4 hours.
Let r, s and t be the time for printing press R, S and T to complete the job alone at their respective constant rate.
Rate of printing press R = 1/r
Rate of printing press S = 1/s
Rate of printing press T = 1/t
Rate = job / time
R + S + T = 4
1/r + 1/s + 1/t = 1/4
S + T = 5
1/s + 1/t = 1/5
Substitute 1/s + 1/t = 1/5 in the equation 1/r + 1/s + 1/t = 1/4
1/r + 1/5 = 1/4
1/r = 1/4 - 1/5
1/r = (5 - 4)/ 20
1/r = 1/20
r = 20 hours
It takes the printing press R 20 hours to complete the job alone
Answer:
5 cups of milk are there in each bowl of chocolate pudding.
Step-by-step explanation:
Given,
The amount of milk is 10 quarts.
The numbers of bowls = 8
Since 1 quart = 4 cups
Therefore 10 quart = 10 × 4 cups
= 40 cups
Since school cafeteria uses 10 quarts of milk to make 8 bowls of chocolate pudding.
⇒ 40 cups of milk is used to make 8 bowls of chocolate pudding.
⇒In 8 bowls , 40 cups of milk are there.
⇒So to get amount of milk in 1 ball ,divide 40 by 8.
Therefore 5 cups of milk are in each bowl of chocolate pudding.
Answer:
Step-by-step explanation:
the cost is $111