Awatch gains 18 seconds in a day. how many minutes will the watch gain in 3 weeks?

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Can someone me with this problem . show your work .

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?