Correct Answer: (a) 35 m³
Solution:Volume of brick with mortar = 200 × 100 × 100 (10 mm mortar thickness on all sides)
Volume of brick with mortar = 0.002 cum(m³)
Volume of 1 brick without mortar = 0.001535 cum(m³)
Volume of 500 bricks without mortar = 0.1539 m³
Volume of brick without mortar for 1 cum = 0.7695 cum(m³)
Volume of brick without mortar = 1 – 0.7695 = 0.2305 cum(m³)
Dry mortar = 0.2305 × 1.51 = 0.348 cm
For 100 m³ brick mortar required–
= 100 × 0.348 = 34.8 cum
= 35 m³