A man started painting a wall of 9:00 a.m. and was able to finish painting 3/5 of it at 10:30 a.m. continuing at this rate at what time will he finish painting the wall? a. 10:45 a.m. b. 11:30 a.m. c. 11:45 a.m. d. 12:15 p.m.

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Answer 1 · 2018-06-18T13:39:29

#b#

#1.5h=3/5"painting"|:3#
#0.5h=1/5"painting"|*5#
#2.5h=1" painting"#

If he started at 9 a.m. ...
...#9+2.5=11.5~~"11:30a.m."#

Answer 2 · 2018-06-18T13:44:06

#color(blue)(11:30 " a.m.")#

If he started painting at 9:00 a.m and finished at 10:30 a.m. Then he has been painting for 1 and a half hours.

So it took 1.5 hours to paint #3/5# of the wall, that means he has #2/5# left to paint.

#:.#

#3/5=1.5 " hrs"#

#1/5=(3/5)/3=1.5/3=0.5#

#2/5=2*1/5=2*0.5=1#

It will take a further 1 hour to complete the painting.

So:

#10:30+1 "hour"=11:30 " a.m".#