Problem 1: Jerry can paint a room in 5 hours. David can paint the same room in 7 hours. how long would it take them to paint the room together?
Problem 2: chris and ty can mow a lawn in 40 min if they work together. if chris works twice as fast as ty, how long would it take them to mow a lawn alone
Thank you
Problem 2: chris and ty can mow a lawn in 40 min if they work together. if chris works twice as fast as ty, how long would it take them to mow a lawn alone
Thank you
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1) 1/5 +1/7 = 12/35
ANSWER 35/12 hours
2) 1/x + 1/2x = 1/40
MULTIPLY BY 40x
40 + 20 = x
60 = x
ANSWER Chris = 60 minutes Ty = 120 minutes
CHECK
1/60 +1/120 = 3/120 = 1/40
ANSWER 35/12 hours
2) 1/x + 1/2x = 1/40
MULTIPLY BY 40x
40 + 20 = x
60 = x
ANSWER Chris = 60 minutes Ty = 120 minutes
CHECK
1/60 +1/120 = 3/120 = 1/40
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Problem 1:5 hours+7 hours=12 hours
Problem 2:Chris would be able to mow a lawn for 26 minutes 40 seconds while Ty could mow a lawn
by 13 minutes 20 seconds
Problem 2:Chris would be able to mow a lawn for 26 minutes 40 seconds while Ty could mow a lawn
by 13 minutes 20 seconds
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Problem 1: 2.5+3.5=6 (i think that is right)
Problem 2: ty: 30 minutes Chris: 10 minutes
I may be wrong though but i am sure that is it
Problem 2: ty: 30 minutes Chris: 10 minutes
I may be wrong though but i am sure that is it