Question

car running at a simple speed covers a distance of 48 kilometre using 3 litres of petrol how much distance will it cover using 4.5 litres of petrol at the same time in variation form Standard 8 ​

Answer 1

Car cover 72 km using 4.5 litres of petrol.

Step-by-step explanation:

GIVEN

Use 3 litres petrol to cover 48 km

Use 4.5 litres petrol to cover x distance

___________________________

To find the distance cover in 4.5 litres petrol,

We need to find the distance cover in 1 litres petrol

___________________________

3 litres = 48 km

1 litres = 48 / 3

1 litres = 16

1 litres = 16 km

Car use 1 litre Petrol to cover 16 km distance

___________________________

The distance cover in 4.5 litres petrol be x

x km = 4.5 litres petrol

x / 16 = 4.5 × 16

x = 72

x = 72 km

Car cover 72 km using 4.5 litres of petrol.

Answer 2

Speed = 48 km / hr

Time = 14 hours

Speed = Distance / Time

Total distance covered by car in 14 hours with a speed of 48 km / hr = 48 × 14 km

Now the new speed = 84 km / hr

∴ Time taken by car = (48×14) / 18=8

hours

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