A petrol tank that is 1/2 full has 8 gallons petrol removed. The tank is then 1/10 full. What is the capacity, in gallons, of the tank?

40

15

20

30

None of these


Description (বিবরণ) :

প্রশ্ন: A petrol tank that is 1/2 full has 8 gallons petrol removed. The tank is then 1/10 full. What is the capacity, in gallons, of the tank?

ব্যাখ্যা:

Petrol removal = 1/2 - 1/10 = 2/5

2/5 of capacity = 8 gallons

So,  full capacity = 8 x 5 / 2 =  20 gallons