A store transports fresh vegetables in crates and cartons using its delivery truck. One crate of vegetables weighs 4 kilograms and one carton 3 kilograms. How much will a load of 12 crates, and 16 cartons of vegetables weigh? Give the rationale and then the answer.
Let's think step by step. The weight of 12 crates of vegetables is 12 * 4 = 48 kilograms. The weight of 16 cartons of vegetables is 16 * 3 = 48 kilograms. So the total weight of all crates and cartons is 48 + 48 = 96 kilograms.. The answer is: 96.

A pen is longer than the rubber by 3 centimeters, and shorter than the pencil by 2 centimeters. Considering the pencil is 12 centimeters long, what is the total length of the rubber, the pen, and the pencil altogether? Give the rationale and then the answer.
Let's think step by step. The pen is shorter than the pencil by 2 centimeters, so it's 12 - 2 = 10 centimeters long. That means the rubber is 10 - 3 = 7 centimeters long. So all accessories are 7 + 10 + 12 = 29 centimeters long altogether.. The answer is: 29.

Once a week, it takes Kitty 5 minutes to pick up toys and straighten the living room. It takes another 20 minutes to vacuum the living room floor, seating and drapes. She spends 15 minutes cleaning the windows and 10 minutes dusting the furniture. After 4 weeks, how long has Kitty spent cleaning just the living room? Give the rationale and then the answer.
Let's think step by step. 5 minutes for picking up toys, 20 minutes to vacuum, 15 minutes on windows and 10 minutes on furniture is 5 + 20 + 15 + 10 = 50 minutes. After 4 weeks, she has spent 4 weeks * 50 minutes / week = 200 minutes cleaning the living room.. The answer is: 200.