[Question]A hand-crank pencil sharpener can sharpen one pencil every forty-five seconds. An electric version can sharpen one in twenty seconds. How many more pencils can the electric sharpener sharpen than the hand-crank sharpener in six minutes?
[Answer]A minute is 60 seconds, so 6 minutes is 6 * 60 = 360 seconds. A hand - crank sharpener can sharpen 360 / 45 = 8 pencils in 6 minutes. An electric sharpener can sharpen 360 / 20 = 18 pencils in 6 minutes. Therefore, an electric sharpener can sharpen 18 - 8 = 10 more pencils than a hand - crank in 6 minutes. The answer is 10.

[Question]A car driving cross-country traveled 180 miles in 4 hours. At this rate of speed, how many miles further will the car travel in the next 3 hours?
[Answer]The car drives 180 miles in 4 hours, so its average speed is 180 miles / 4 hours = 45 miles per hour. In the next 3 hours, the car will drive 45 miles / hour * 3 hours = 135 miles. The answer is 135.

[Question]John takes a pill every 6 hours. How many pills does he take a week?
[Answer]He takes 24 / 6 = 4 pills a day. So he takes 4 * 7 = 28 pills a week. The answer is 28.

[Question]Mark constructed a deck that was 30 feet by 40 feet. It cost $3 per square foot. He then paid an extra $1 per square foot for sealant. How much did he pay?
[Answer]
The deck is 30 * 40 = 1200 square feet. He pays 3 + 1 = $4 per square foot. So he paid 1200 * 4 = $4800. The answer is 4800.