Question

$\huge \pink \star{ \green{ \boxed{ \boxed{ \boxed{ \purple{ \mathfrak{Question :}}}}}}} \pink\star$


☞ $\mathtt{\bf{\underline{\red{Need\:full\:explanation\:}}}}$
☞ $\mathtt{\bf{\underline{\red{Kindly\:don't\:spam\:}}}}$

$\huge\underline{\underline{\texttt{\pink{Thank you}}}}$

AN⛎SHA ☺❤✌❄​

Answer 1

Question 1 :-

Let the old price be $ x a litre , then according to the question, new price would be $ x + 0.02 a litre because one dollar is equal to 100 cents.

It is given that he bought 20 litres of petrol at the old price i.e., $ x a litre and also, He bought 10 litres at the new price i.e., $ x + 0.02 a litre.

Therefore,

⇒ Cost of 20 litres at the old price = $ 20x

Similarly,

⇒ Cost of 10 litres at new price = $ 10x + 2

It is given that the total cost is $ 9.20

So,

⇒ 20x + 10x + 2 = 9.20

⇒ 30x = 7.20

⇒ x = 0.24

Hence, The old price of the petrol is 240 cents a litre or $ 0.24 a litre.

Question 2 :-

It is given that the age of vera is 4 years while the age of vikki is 13 years.

We need to find when would the age of vikki will be twice as of vera.

Let it be x years, we have

⇒ 2(4 + x) = 13 + x

⇒ 8 + 2x = 13 + x

⇒ x = 13 - 8

⇒ x = 5

Hence, After 5 years, vikki would be twice as old as vera.

Answer 2

$\huge \pink \star{ \green{ \boxed{ \boxed{ \boxed{ \purple{ \mathfrak{Answer :}}}}}}} \pink\star$

1) 30 cents

2) 9,18 years

✨REFER TO THE PIC✨

Sorry for mistakes(cuttings)

HOPE IT HELPS

FOLLOW