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 inch

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​

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Gabriella 1 month 2021-08-21T22:11:30+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-21T22:13:17+00:00

    Answer:

    37=B

    40=D

    39=D

    I think so it is helpful for you.

    0
    2021-08-21T22:13:20+00:00

    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.

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