Question
If a cube of a number is subtracted from (153)², the
number so obtained is 1457, Find the number.Solution
Let the number be x. ATQ- (153)2 – x3 = 1457 23409 – x3 = 1457 x3 = 23409-1457 = 21952  x = √ (21952)  x = √ [2× 2× 2× 2× 2× 2 × 7 × 7 × 7] x = 2 × 2 × 7 = 28
A certain number of students from school X appeared in an examination and 30% students failed. 150% more students than those from school X, appeared in ...
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‘a’ is directly proportional to ‘b’. If at a=30, the value of ‘b’ is 20% greater than ‘a’, then find the value of ‘a’ when b=54.
...47.98 × 4.16 + √325 × 12.91 + ? = 79.93 × 5.91
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If (r + s + t) = 12 and (rs + st + tr) = 60, then find the value of (r² + s² + t²).