Question

If two no whose ratio 3:4 and their lcm is 120 then find the sum of two numbers

Answer 1

let common multiple be x .

n1 = 3x ,n2 = 4x

By relation between number and LCM,hcf

3x × 4x = 120 × x

x = 120÷12= 10

n1 + n2 = 3x + 4x = 30 +40 = 70

Answer 2

ans ---70

Step-by-step explanation:

let given ratios are be in x

so given ratios=3xand4x = 120

then,

3x X 4x =120

12x=120

x= 120/12

x =10

then, the sum of two number

10X3 +10X4

30+40=70

hence the sum of two number is 70

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