Question

8. The LCM of two numbers is 20 times of their
HCF and (LCM + HCF) = 2520. If one number is
480, what will be the triple of another number?
(a) 4200 x 1500 (c) 2100 (d) 1800​

Answer 1

Answer:

d) 1800

Step-by-step explanation:

20× HCF=LCM

(Substitute in LCM+HCF=2520)

20×HCF+HCF=2520

21×HCF=2520

HCF=2520÷21=120

Therefore LCM= 120×20=2400

LCM×HCF= Product of the two nos.

2400×120=480×y

(2400×120)/480=y

y=600

3 times the no. is=3×600= 1800

Ans= 1800