Question

Chance can wash the car in 2 hours, while Sandy can wash the same car in 4 hours. How many hours would it take for them to wash the car together?

four thirds

three fourths

3

4

Answer 1

Answer: First Option is correct.

Explanation:

Since we have given that

Number of hours Chance can wash the car = 2 hours

Number of hours Sandy can wash the car = 4 hours

Work done by Chance per hour is given by

`(1)/(2)`

Work done by Sandy per hour is given by

`(1)/(4)`

Work done by altogether per hour is given by

`(1)/(2)+(1)/(4)\\\\=(2+1)/(4)\\\\=(3)/(4)`

So, Number of hours they take if they together wash the car is given by

`(4)/(3)`

Hence, First Option is correct.