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Patulong po(θ‿θ)

1.what part of the job can Daryl finish in 1 hour?
A.1/6
B.1/4
C.4
D.6

what part of job can Mark finish in 2 days?
A.1/4
B.1/2
C.2
D.4

3.if they will work together,what equation would represent the part of the job they can finish in 1 day?
A.1/6+1/4=1/×
B.1/6+1/4=×
C.6+4=1/×
D.6+4=×

4.what is the answer to the problem?
A.2.2 hours
B.2.3 hours
C.2.4 hours
D.2.5 hours​