Problema Solution
1. ten lamps can burn 10 liters of oil in 10 hours. how many lamps can burn 20 liters of in 20 hours?
Answer provided by our tutors
Let 'v' represent the rate of burning per lamp in liters per hour.
10v = 10/10
10v = 1
v = 1/10 liter per hour
Let 'n' represent the number of lamps that burn 20 liters in 20 hours.
Then we have:
v*n = 20/20
n/10 = 1
n = 10 lamps
10 lams can burn 20 liters in 20 hours.