Raju can paint a door in 1 hour 45 min. how many similar doors can be paint in 7 1/2 hours?
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A man can paint a door in 1 1/4 hours ( or 1.25). How many doors can he paint in 7 1/2 hours ( or 7.5).
Divide 7.5 hours into 1.25 hours segments, for 7.5 / 1.25.
Multiply by (100/100) to give us 750/125 = 6.
Check 125 * 6=750, 6*25=150, 6*100=600; 150+600=750.
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