Q.4 It takes two hours for a person X to mow the lawn. Y can mow the same lawn in four hours. How
long (in minutes) will it take X and Y, if they work together to mow the lawn?
(A) 60
(B) 80
(C) 120
(D) 90
Answer:(B)
Explanation:
Q.4 It takes two hours for a person X to mow the lawn. Y can mow the same lawn in four hours. How
long (in minutes) will it take X and Y, if they work together to mow the lawn?
(A) 60
(B) 80
(C) 120
(D) 90
Answer:(B)
Explanation:
