Free GRE Practice Question

Question 1 of 1
ID: GRE-NE-9
Section: Quantitative Reasoning - Numeric Entry
Topics: Word Problems; Time and Work
Difficulty level: Medium

Practice Mode: Single selected Question » Back to Overview

A water-tank is partially-filled with 150 litres of water. Two pipes that fill at the rate of 12 litres per minute and 15 litres per minute are used to fill the tank along with another pipe, which can fill the empty tank completely in 60 minutes. If the three pipes together take 30 minutes to fill the partially-filled tank, what is the capacity of the tank in litres?

Numeric Answer:

General Hint: Enter the answer as an integer or a decimal in a single answer box. If two answer boxes are given, enter the answer as a fraction, with one box being the numerator and the other being the denominator. Read carefully whether the answer should rounded and make sure you round to the required degree of accuracy. Do not enter any symbols or characters in the box(es) provided.

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