A retaining wall with measurements 30 {m} \times 12 {m} \times 6 {m} was constructed with bricks of dimensions 8 {cm} \times 6 {cm}. If 60 \% of the wall consists of bricks used for the construction is lakhs.

GATE Civil Engineering (CE) 2019 Shift 2 Solved Paper

Question : 4 of 65

Marks: +1, -0

A retaining wall with measurements

30 {m} × 12 {m} × 6 {m}

was constructed with bricks of dimensions

8 {cm} × 6 {cm}

. If

60 \%

of the wall consists of bricks used for the construction is lakhs.

Solution:

Volume of wall

=30 × 12 × 6=2160 {m}^{3}

=2160 × 106 {cm}^{3}

Total volume of bricks required

=2160 × 106 × 0.6 {cm}^{3}=1296 × 106 {cm}^{3}

Volume of one brick

=8 × 6 × 6=288 {cm}^{3}

∴

No. of bricks required

=\;{1296 × 10^{6}}/{288}

=4.5 × 10^{6}=45

lakhs

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