Q. If $3 < 3t - 18 \leq 18$, then which one of the following is true?
A) $15 \leq 2t + 1 \leq 20$
B) $8 \leq t < 12$
C) $8 \leq t + 1 \leq 13$
D) $21 \leq 3t \leq 24$
Explanation
(c)
$3 \leq 3t - 18 \leq 18$
$\Rightarrow \ \ 21 \leq 3t \leq 36$
$\Rightarrow 7 \leq t \leq 12$
$\Rightarrow 8 \leq t + 1 \leq 13$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.