Answer:
The value of time required to clean the car by both persons working together = 1.714 hours
Step-by-step explanation:
Time taken by first person to clean the car [tex]T_{1}[/tex] = 3 hours
Time taken by second person to clean the car [tex]T_{2}[/tex] = 4 hours
Time taken by both persons to working together T = [tex]\frac{T_{1} T_{2} }{T_{1} + T_{2}}[/tex]
Put the values of [tex]T_{1}[/tex] & [tex]T_{2}[/tex] in above formula we get,
⇒ T = [tex]\frac{12}{7}[/tex] hours = 1.714 hours
This is the value of time required to clean the car by both persons working together.
