Correct Answer - Option 3 : 80
Given:
The HCF and LCM = 20 and 240
And first numbers = 60
Formula used :
We know that formula, first number × second number = LCM × HCF
Calculation
We use the formula, first number × second number = LCM × HCF
Put the value,
Second number = 240 × 20 ÷ 60 = 80