Step-by-step explanation: [tex]required \: number = \frac{lcm \times hcf}{40} = \frac{420 \times 20}{40} = \frac{420}{2} \\ \\ = 210[/tex] Reply
Step-by-step explanation:
[tex]required \: number = \frac{lcm \times hcf}{40} = \frac{420 \times 20}{40} = \frac{420}{2} \\ \\ = 210[/tex]