RRB Group D 1-Dec-2013 Shift 1 Solved Paper

Length of the pool = 20 m
Breadth of the pool = 15 m
Height of the pool = 3 m
Total surface area of the pool = 2(l+ b)h + lb
= 2(20 + 15)3 + 20 × 15
= 210 + 300 = 510 m2
Total cost of repairing the floor = 510 ×25 = ₹ 12750