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Distance between two-points A and B is 180 km. A bike covers a 30 km distance in 1 liter and the price of petrol is Rs. 100 per liter, If the price of petrol increased by 20% . Then find how much more money spends to cover the same distance.
1. Rs. 120
2. Rs. 140
3. Rs. 110
4. Rs. 100

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Correct Answer - Option 1 : Rs. 120

Given:

Price of petrol = Rs. 100 per liter

The distance covered by bike in 1 liter = 30 km

Calculation:

Petrol consumption to cover 180 km distance = 180/30

Petrol consumption to cover 180 km distance = 6 litre

1 litre petrol price = Rs. 100

6 litre petrol price = Rs. 600

⇒ Increased price of petrol per litre = 100 × 120%

⇒ Increased price of petrol per litre = 100 × (120/100)

⇒ Increased price of petrol per litre = Rs. 120

⇒ 6 litre petrol price = 6 × 120

⇒ 6 litre petrol price = Rs. 720

⇒ Difference between money to cover a same distance = 720 – 600 = 120

∴ Rs. 120 spend more to cover a same distance.

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