Question

a car had 42 litres of petrol in its tank during a journey 3/7 of it used how much of petrol remain​

Answer 1

$18 \: litres$

$Given \:$

$Total \: petrol \: = 42 \: l$

$Part \: it \: consumed \: = \frac{3}{7}$

$To \: find \:$

$⇨petrol \: \: remained \:$

$<u>C</u><u>a</u><u>l</u><u>c</u><u>u</u><u>l</u><u>a</u><u>t</u><u>i</u><u>o</u><u>n</u>$

$= \: \frac{3}{7} \times \frac{42}{1}$

$= \frac{3}{1} \times \frac{6}{1}$

$= 3 \times 6$

$= 18 \: l$

Answer 2

Answer:

18 litres

Given \:Given

Total \: petrol \: = 42 \: lTotalpetrol=42l

Part \: it \: consumed \: = \frac{3}{7}Partitconsumed=

7

3

To \: find \:Tofind

⇨petrol \: \: remained \:⇨petrolremained

CalculationCalculation

= \: \frac{3}{7} \times \frac{42}{1}=

7

3

×

1

42

= \frac{3}{1} \times \frac{6}{1}=

1

3

×

1

6

= 3 \times 6=3×6

= 18 \: l=18l

hope it helps .