amanvermagmat wrote:

W1, W2 are two rectangular tanks. Is the lateral surface area of W1 greater than that of W2?

(1) Height of tank W1 is equal to that of W2.

(2) W1 has a square base. Area of base of W1 is same as the area of base of W2.

I agree that the answer will be C. But my explanation as below. Plz correct me if i am wong

Lateral surface area of W1; after combining both the statement is 2h(L+L) as it has a square base

So if i assume L=2, then lateral area for W1 becomes = 2h(2+2)

But in statement 2 it is not mentioned that W2 base is also a square; it only says the area of W2 base = base of W1

So, for W2 base, L can be= 1 and B can be=4; so base area of W2 = 4*1 (equal to base area of W1)

Now for W1 lateral area = 2H(2+2) but W2 lateral area = 2H(1+4)

So, W2>W1,(as in statement 1 it is mentioned H is same for both tanks); we can try out different number combinations and always see that W2> W1

The catch here that in statement 2 it is not mentioned that W2 also has a square base (only says it has same base area as W1 )