If the ratio of two number is 3:4 and lcm of the number is 180 then what is one of the numbers

The ratio between two numbers is 3: 4. If their L.C.M., is 180. Find the numbers.

Let the required numbers be 3x and 4x.The L.C.M., of 3x and 4x = 12xThen 12x = 180⇒ x = 15HEnce, the required numbers are3x = 3 x 15 = 45

4x = 4 x 15 = 60.

Concept: Concept of Ratio

  Is there an error in this question or solution?

Two numbers are in the ratio $$3:4$$. If their LCM is $$180$$, find the numbers. Let the two numbers be $$3x$$ and $$4x$$ and HCF be $$x$$

We know that 

Product of two number=Product of their LCM and HCF

So,

$$4x\times3x=180\times x$$

$$12x^2=180x$$

$$12x=180$$

$$x=15$$

$$3x=3\times15=45$$

$$4x=4\times15=60$$

Therefore the numbers are $$45$$ and $$60$$.

7.

The numerator of a fraction is multiple of two numbers. One of the numbers is greater than the other by 2. The greater number is smaller than the denominator by 4. If the denominator 7+C (C > -7) is a constant, then the minimum value of the fraction is

  • 5

  • If the ratio of two number is 3:4 and lcm of the number is 180 then what is one of the numbers
  • -5

  • -5

D.

-5

Let the first number be x.then, second number would be (x+2).According to the question,x + 2 + 4 = 7 + c  ⟹   x + 6 = 7 + c⟹   x  = 1 + c∴   Fraction

  

If the ratio of two number is 3:4 and lcm of the number is 180 then what is one of the numbers

For the minimum value,  - 3 < c < -1∴   c = -2∴  Required value of fraction = -1/5