After filling the car's fuel tank, adriver drove from P and Q and then to R. He used 2/5 of the fuel driving from P and Q. If he used another 7 gallons to drive from Q to R and still had 1/4 of the tank full, what is the capacity of the tank in gallons?

প্রশ্নঃ After filling the car's fuel tank, adriver drove from P and Q and then to R. He used 2/5 of the fuel driving from P and Q. If he used another 7 gallons to drive from Q to R and still had 1/4 of the tank full, what is the capacity of the tank in gallons?