1) a car travels 128 km on 12 litres of petrol. find out how far the car would travel on a full tank of petrol that can hold 36 litres of petrol?
2) a photographer enlarge a 7×5 photo to a 14×10 photo. can u find if the school sizes of these two photos form a proportion
Answers
Answer:In 12litres petrol, car can travel =128Km. 128/12 ×30=320Km
Step-by-step explanation:
1) GIven,
A car travels 128 km on 12 litres of petrol
To find,
How far the car would travel on a full tank of petrol that can hold 36 litres of petrol
Solution,
With every 12 litres of petrol, the car travels 128 km
Therefore, With 12*3 litre of petrol, the car travels 128*3 km
or, With 36 litre of petrol, the car travels 384 km
Hence, the car would travel on a full tank of petrol that can hold 36 litres of petrol is 384 km
2) Given,
a photographer enlarge a 7×5 photo to a 14×10 photo
To find,
Find if the school sizes of these two photos form a proportion
Solution,
Area of the original photo of size 7X5 = 35
Area of the enlarged-photo = 14 X 10 = 140
The Proportion of the two photos = Area of the original photo/Area of the enlarged photo
or, The Proportion of the two photos = 35 : 140 = 1:4
Hence, the proportion is 1:4