The Automobile Association of South Africa recommends that the drivers reduce their speed in the ratio 4:5 in wet weather. If a man normally drives at 120 kilometers per hour what should his wet weather speed is?
The man should drive at 96 kilometers per hour in wet weather.
To find the wet weather speed, we need to determine the reduction in speed based on the given ratio.
Given that the recommended ratio for reducing the speed in wet weather is 4:5, we can assume that the reduction factor is 4/5.
To calculate the wet weather speed, we multiply the reduction factor by the normal speed:
Wet weather speed = (reduction factor) * (normal speed)
= (4/5) * 120 km/hour
= (4 * 120) / 5 km/hour
= 480 / 5 km/hour
= 96 km/hour
Therefore, the recommended wet weather speed for this driver is 96 kilometers per hour.
To find the wet weather speed, we need to use the given ratio of 4:5.
Step 1: Determine the ratio change factor.
The ratio change factor is calculated by dividing the second number of the ratio (5) by the first number (4).
Ratio change factor = 5 / 4 = 1.25
Step 2: Multiply the normal speed by the ratio change factor.
Wet weather speed = Normal speed × Ratio change factor
Wet weather speed = 120 km/h × 1.25
Step 3: Calculate the wet weather speed.
Wet weather speed = 150 km/h
The man's wet weather speed should be 150 kilometers per hour.