The number of planks of dimensions (4 m × 5 m × 2 m) that can be stored in a pit which is 40 m long,
Question:
The number of planks of dimensions (4 m × 5 m × 2 m) that can be stored in a pit which is 40 m long, 12 m wide and 16 m deep, is
(a) 190
(b) 192
(c) 184
(d) 180
Solution:
(b) 192
Number of planks $=\frac{\text { volume of the pit }}{\text { volume of } 1 \text { plank }}$
$=\frac{40 \times 12 \times 16}{4 \times 5 \times 2}$
$=\frac{7680}{40}$
$=192$