Answers

2014-11-01T20:25:46+05:30
5 tiles are required
because
upper surface of the tank is covered with a lid


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2014-11-02T15:49:37+05:30
TOTAL AREA TO BE TILED = 4×a²
                                           = 4×(2.5)²
                                           = 4×6.25
                                           = 25 cm²
total area of 1 tile = 25×25
                           =625 cm²
no:of tiles = 25/625
                =.04 
if side of tank  = 2.5 m long
 
area to be tiled = 2.5² × 4
                       =  25 m² 
                       = 2500 cm²      
area of 1 tile     = 625 cm²

no:of tiles        = 2500/625
                      =  4



it's just a try


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