How to Conquer GMAT Rate Problems

[@ashishsinha9035]

Thanks PrepScholar and Erica !

[@jauipop]

Got this question in my practice test and I fumbled (like you said that most students would) and when I actually did it outside of a timed situation (i.e. without panicking), I went "duh". lol

[@ashwinrebbapragada7626]

This is an excellent question and explanation. Thank you for your time and service.

[@fazalbangash9653]

please try to give detail and methods to solve maths problems in GRE ..

[@benjamincarter4951]

So just another way to do this by POS, I wrote down 50, 100, 150, 200, 250. Then right beside it I wrote down 30, 60, 90, 120, 150, 180, 210, 240. Basically getting the 30s as close as possible to the 5 hours for 50s then I put the 8/12 for the 30s for the gallons of gas used and multiplied the 8 and 12 by 3 and got 24/36. All in all it only took about 15 seconds to do it by POS.

[@evtan]

Great tip, thanks Erika!

[@unnatideep1672]

There's another easy way to this. Since the speed is constant for the gasoline usage and the driving.
At 50 miles --> 1 gallon/30 mins = 2 gallons/hr
At 50 miles -->? gallon --> 5 hours x 2 gallons = 10 gallons
10(used)/12 (total) = 2/6
Look at the options, E is the square of 2/6
Therefore, option E

[@pathardy6494]

Erica is the GOAT

[@rawanalnajjar4072]

Thanks A bunch, I hope you talk about the best strategies that we should use to solve other types of problems.

[@vickkydude]

Erika thanks 🙏🏻

[@piyushkadam7619]

thanks

[@WorldExplorerIndia]

👍👍