The average speed of a car is 75 kms/hr What will be the average speed of the car if the driver decreases the average speed of the car by 40 percent?

Options

A. 50 Kms/Hr
B. 45 Kms/Hr
C. 40 Kms./Hr
D. 55 Kms/Hr

Answer

To find the new average speed of the car after a decrease of 40%, we can follow these steps:

### Step 1: Determine the decrease in speed
First, we need to calculate how much 40% of the current speed (75 km/h) is.

\[ \text{Decrease in speed} = \text{Current speed} \times \frac{40}{100} \]

Substituting the current speed:

\[ \text{Decrease in speed} = 75 \times \frac{40}{100} = 75 \times 0.4 = 30 \text{ km/h} \]

### Step 2: Calculate the new average speed
Now, we subtract the decrease from the current speed to find the new average speed.

\[ \text{New average speed} = \text{Current speed} - \text{Decrease in speed} \]

Substituting the values we have:

\[ \text{New average speed} = 75 - 30 = 45 \text{ km/h} \]

### Final Answer
The average speed of the car after the decrease will be **45 km/h**.

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