Question

a car can go 180 km in 10 littes of petrol how far would it be able to go in 35 litres of petrol?​

Answer 1

Answer:

180/10=18

so 1 ltr=18km

so 18×35=630km

Answer 2

GIVEN :

• A car can go 180 km in 10 litres of petrol. How far would it be able to go in 35 litres of petrol.

TO FIND :-

• The distance required in 35 litres of petrol.

SOLUTION :-

★ Direct variation :- If two quantities are in such a way that an increase in one quantity result in a corresponding increase in the other and decrease in one quantity result in corresponding decrease in the other is called direct variation.

i.e x/y = constant

→ x/y = k

→ xy = k

For two cases,

→ x1/y1 = x2/y2

★ Inverse variation :- If two two quantities are in such a way that increase in one quantity result in a decrease in the other and decrease in one quantity result in a increase in the other quantity is called inverse variation.

i.e let x and y are two quantities then for inverse variation,

→ xy = constant.

→ xy = k

For two cases,

→ x1 × y1 = x2 × y2

★ Here in the question it is a case of direct variation therefore,

→ x1/y1 = x2/y2

→ 180/10 = x/35

→ 18 = x/35

→ x = 18 × 35

→ x = 630

Hence distance required for 35 litres of petrol is 630 km.