Question

Q1) A car travel 47 km with 4 litres of petrol. How much petrol will be needed to travel a distance of 235km?
Q2) If twenty cans of 1 litre fruit juice are packed in one carton, then How many cartons are needed to pack 500 such cans ?
Q3) 120 books of the same size are packed in 5 box . How many such boxes are needed to pack 216 similar books ?

Answer 1

(1) Given: A car can travel 47 km with 4 litres of petrol.
$\Rightarrow$ Car can travel 1 km with $\frac{4}{47}$ litre of petrol.
$\Rightarrow$ Car can travel 235 km with $\frac{4}{47}\times 235=20$ litres of petrol.
(2) Given: 20 cans are pack in one carton.
So, 1 can occupy $(\frac{1}{20}{)}^{th}$ space of a carton.
So, 500 cans are pack in $\frac{1}{20}\times 500=25$ cartons.
(3) Given: 120 books of the same size are packed in 5 box.
So, 1 book can occupy the $(\frac{5}{120}{)}^{th}$ space of a box.
So, 216 books are packed in $216\times \left(\frac{5}{120}\right)=9$ boxes.