Question

$10lm$ is one of the factors of $20l^{2}m+30alm$.
The other factor is:

• A. 5l + 3m
• B. 2l + 3a
• C. 3l + 2m
• D. 3l + 2a

Answer 1

The correct option is B

2l + 3a

Given $20l^{2}m+30alm$

= 10($2l^{2}m+3alm$) [Taking 10 common]
= 10$lm$ (2$l$ + 3$a$) (Taking $lm$ common)

Hence (2$l$ + 3a) is the other factor