This question was previously asked in

Dehli Police Constable Previous Paper 23 (Held on: 14 Dec 2020 Shift 1)

Option 2 : 14.8

Delhi Police Constable 2020: Full Mock Test

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100 Questions
100 Marks
90 Mins

**Given:**

Cost of a Car is 300% more than cost of a Bike.

**Formula Used:**

Percent Increased = (New price – Original price)/Original Price × 100

**Calculation:**

Let the cost of a bike be Rs. 100

Cost of a car be 300% more than 100

⇒ Cost of car = 100 + 300% of 100

⇒ Cost of car = 100 + 300

⇒ Cost of car = 400

Now the cost of Car increased by 10%

New cost of Car = 110% of 400

⇒ New cost of Car = 110/100 × 400

⇒ New cost of Car = 440

Increase in cost of 1 Car,

⇒ 440 – 400

⇒ 40

And cost of a bike increased by 30%

New cost of a bike = 130% of 100

⇒ New cost of a bike = 130/100 × 100

⇒ New cost of a bike = 130

Increase in cost of 1 Bike,

⇒ 130 – 100

⇒ 30

Original price of 4 cars and 5 bikes is,

⇒ 4(400) + 5(100)

⇒ 1600 + 500

⇒ 2100

Increased price of 4 cars and 5 bikes is,

⇒ 4(40) + 5(30)

⇒ 160 + 150

⇒ 310

Percent increased = 310/2100 × 100

⇒ Percent increased = 310/21

⇒ Percent increased = 14.76

**∴ The percent increased in the price is 14.8**