If 30% of a number is 63 less by three fourth of that number. Then the number…
2021
If 30% of a number is 63 less by three fourth of that number. Then the number is :
- A.
140
- B.
126
- C.
82
- D.
93
Attempted by 6 students.
Show answer & explanation
Correct answer: A
Let the number be x.
30% of x = 0.3x
Three fourth of x = (3/4)x
According to the problem: 0.3x = (3/4)x - 63
Now solve the equation:
0.3x = 0.75x - 63
0.3x - 0.75x = -63
-0.45x = -63
x = 63 / 0.45
x = 140
हिन्दी उत्तर:
माना संख्या x है।
x का 30% = 0.3x
x का तीन-चौथाई = (3/4)x
प्रश्नानुसार: 0.3x = (3/4)x - 63
अब समीकरण को हल करें:
0.3x = 0.75x - 63
0.3x - 0.75x = -63
-0.45x = -63
x = 63 / 0.45
x = 140