# GMAT Math Questions | GMAT Rates Q9

#### Time & Work | Rates | GMAT Sample Questions

This GMAT quant question is a word problem in work and time. Concept: framing equations when two people with different efficiencies (rate at which they work) work together to complete a task. An easy, GMAT 600 level, quantitative reasoning question.

Question 9: Ram, who is half as efficient as Krish, will take 24 days to complete a task if he worked alone. If Ram and Krish worked together, how long will they take to complete the task?

1. 16 days
2. 12 days
3. 8 days
4. 6 days
5. 18 days

## GMAT Live Online Classes

### Explanatory Answer | GMAT Time & Work Word Problem

Ram takes 24 days to complete the task, if he works alone.
Krish is twice as efficient as Ram is. So, working alone, Krish will take half the time to complete the task.i.e., 12 days.

Ram will complete $$frac{1}{24}$th of the task in a day. Krish will complete $\frac{1}{12}$th of the task in a day. When they work together, they will complete $\frac{1}{24} + \frac{1}{12} = \frac{1}{8}$th of the task in a day. Therefore, when they work together they will complete the task in 8 days. #### Choice C is the correct answer. #### GMAT Online CourseTry it free! Register in 2 easy steps and Start learning in 5 minutes! #### Already have an Account? #### GMAT Live Online Classes Next Batch Sep 14, 2021 #### GMAT Coaching in Chennai Next Batch after Lockdown #### GMAT Coaching in Chennai Sign up for a Free Demo of our GMAT Classes in Chennai ##### Where is Wizako located? Wizako - GMAT, GRE, SAT Prep An Ascent Education Initiative 14B/1 Dr Thirumurthy Nagar 1st Street Nungambakkam Chennai 600 034. India ##### How to reach Wizako? Phone:$91) 44 4500 8484
Mobile: (91) 95000 48484
WhatsApp: WhatsApp Now
Email: learn@wizako.com