Question

A truck uses 28litres of petrol per 100km.How many Litres would be used in,
(a)10km (b)40km ??Show Calculations

Answer 1

Answer:

a

Step-by-step explanation:

as u see 100km is equal to 10km and it's 28 liters will be distracted or contibrute to every km

so the answers is @

Answer 2

Given:

✰ A truck uses 28 litres of petrol per 100 km.

To find:

✠ How many litres would be used in,

• (a) 10 km
• (b) 40 km

Solution:

We will solve this sum by using simple unitary method,

Using unitary method,

⟹ A truck uses of petrol per 100 km = 28 litres

⟹ A truck uses petrol per 1 km = 28/100

⟹ A truck uses petrol per 1 km = 0.28 litres

How many litres would be used in 10 km ?

➤ A truck uses petrol per 1 km = 0.28 litres

➤ A truck uses petrol per 10 km = 0.28 × 10

➤ A truck uses petrol per 10 km = 2.8 litres

∴ A truck uses petrol per 10 km = 2.8 litres

How many litres would be used in 40 km ?

➤ A truck uses petrol per 1 km = 0.28 litres

➤ A truck uses petrol per 40 km = 0.28 × 40

➤ A truck uses petrol per 40 km = 11.2 litres

∴ A truck uses petrol per 40 km = 11.2 litres

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