Question
In a rectangular floor of length and breadth of 15
metres and 9 metres, respectively, square tiles each of 3 metre edge length are to be laid. If the cost of each tile is Rs. 160, then find the total cost of the tiles to be laid in the room.Solution
Area of the rectangular room = 15 × 9 = 135 m2 Area of each tile = 3 × 3 = 9 m2 So, number of tiles to be laid in the room = (135/9) = 15 So, total cost of all the tiles laid in the room = 15 × 160 = Rs. 2400
38    40    83    254    ?     5126
Find the wrong number in the given series.
3 1.5 1.5 ? 4.5 11.25
...If 7             16      x    90       171          292
Then, 2x 2 +  1 + x ...
98    219    75    244    ?    273
Find the maximum number of trees which can be planted, 25 meters apart, on the two sides of a straight road 2125 meters long
43 36 50 29 ? 22
...6Â Â Â Â Â Â Â Â Â Â 5Â Â Â Â Â Â Â Â Â Â 40Â Â Â Â Â Â Â Â Â Â Â 32Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 249Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 240
104   106   110   113   ?   126
6 2 8 ? 84 416
...75    196    52    221    ?    250
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