It takes Tom 1 hour to lay 30 bricks.
He has to lay 180 bricks.
Tom starts to lay the bricks at 9 a.m.
He has a half-hour break at 11 a.m.
He has another half-hour break at 1 p.m.
What time should Tom finish laying the 180 bricks?
Answer (2)
To calculate what time Tom should finish laying 180 bricks, we first need to determine how long it takes him to lay one brick and then use this to calculate the total working time required for 180 bricks. Tom can lay 30 bricks in 1 hour, which means he lays one brick in 2 minutes (60 minutes / 30 bricks).
For 180 bricks, the time needed is 180 bricks * 2 minutes per brick = 360 minutes or 6 hours. Tom starts at 9 a.m. and takes half an hour breaks at 11 a.m. and 1 p.m. which add up to 1 hour of break time. We must add this hour to the 6 hours of brick-laying time.
The total time including breaks would be 7 hours. Therefore, if Tom starts at 9 a.m., he should finish laying the bricks at 4 p.m. (7 hours after 9 a.m.).
Tom will finish laying the 180 bricks at 4 p.m. after working for 6 hours and taking 1 hour for breaks. He starts at 9 a.m. and has two half-hour breaks during the day.
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