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A brick measures 20 cm × 12 cm × 8 cm. How many bricks are needed to build a wall 16.8 m high, 2.5 m wide and 12 cm thick?
A6252
B2652
C2625
D5262
Answer & Solution
Correct answer: C. 2625
1. Wall volume = 1680 cm × 250 cm × 12 cm = 5,040,000 cm³.
2. Brick volume = 20 × 12 × 8 = 1920 cm³.
3. Number of bricks = 5,040,000 / 1920 = 2625.
_Source: RRB Group D CEN-02/2018 PYQ, Q.53._