Question
Find the area of triangle having sides in the ratio
4:5:7 & the perimeter of the triangle is 16 cmSolution
As sides are in ratio of 4:5:7 so perimeter of this triangle = 4K+ 5K+ 7K = 32 Or 16K = 32 or K = 2 So, sides are 8cm, 10 cm & 14 cm. Here s = semi perimeter = (8 + 10 + 14)/2 = 32/2 = 16 cm So area of this triangle = √(16 (16 - 8)(16 - 10)(16 - 14)) = √(16 × 8 × 6 × 2) = 16√6 cm 2
16, 32, 68, 132, ?, 376
What will come in place of the question mark (?) in the following series?
60, 94, 184, 464, 1388, ?
Complete the series choosing the missing number.
110, 99, 86, ___, 54, 35.
380, ?, 360, 324, 260, 160
8      27       64      125     ?       343Â
...137, 130, ?, 95, 67, 32
2, 13, 27, 44, ?, 87
What will come in place of the question mark (?) in the following series?
20, ?, 30, 60, 150, 450
5   3   4   7.5   17    ?    138
1290, 1225, 1175, ?, 1112, 1095, 1085
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