Answer: 1. 15 in long, 2 in wide, 2 in thick. 2, 10 in long 3 in wide and 2 in thick. 3, 5 in long by 6 wide 2 thick.
Explanation:
All you have to do is try to factor the number sixty, by dividing, then dividing what comes out of that. You stop once you have factored to the point you want to.