Question

37. If length 3 cubic Inch, width is 3 cubic inch
height, 3 cubic inch than tell the volume?
(A) 27 cubic Inches (B) 28 cubic inches
(C) 30 cubic inches (D) None of these
38. A, B and C average is 45, B and C average is
40 then find B = ?
(A) 41
(B) 31
(C) 51
(D) None of these
39. Find the value of x. 3x - 15 - 6 = 0
(A) 41
(B) 31
(C) 51
(D) None of these​

Answer 1

Answer:

37=B

40=D

39=D

I think so it is helpful for you.

Answer 2

Answer:

38.Average wt of A,B and C = 45 kg.

(A+B+C)/3= 45 kg

A+B+C = 45 *3

Thus A+B+C=135 kg ( eq 1)

Average weight of And B= 40 Kg

(A+B)/2= 40

Thus, A+B= 40*2 = 80 kg ( eq 2)

Average weight of B and C= 43

(B+C)/2= 43 kg

Thus , B+C= 43 *2 = 86 kg ( eq 3)

Let us add eq 2 and 3 to get : A+B+B+C = 80 + 86 kg = 166 kg

Thus, A+B+B+C= 166 kg.

or A+B+C+B= 166 kg.

But from eq 1 we know that , A+B+C= 135 kg.

Thus, 135+B= 166 kg.

40.Thus, B = 166–135= 31 kg.