Question

The image below shows the base of the stage made up of blocks. If there are 4 such layers, then how many blocks are there in total?

• A. 168
• B. 160
• C. 158
• D. 150

Answer 1

The correct option is B 160

Volume = length × width × height
$⟹$ v = 8 × 5 × 4
Number of blocks in 1 layer
= $8\times 5=40$
Total number of blocks in 4 layers
= $4\times 40=160$

Thus, 160 blocks are used in total.