Question 999628
V= Bh/3 but we want to find the area of the Base. Let's isolate the Base, multiply both sides by 3:
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V*3= Bh Now divide both sides by h:
(V*3)/h= B 
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OK, now let's plug in the numbers provided in the problem:
(252*3)/12= B
756/12= B
B= 63 Now factor 63: It's divisible by 1, 7, 9. 7*9= 63 and 9= 7+2 so the base of your pyramid is 7*9.