Three people must travel from one side of a bridge to the other. There is one flashlight among them. Anyone who travels across the bridge must use a flashlight. A maximum of two people can travel across the bridge at any particular time. The time it takes for each of the three people to travel over the bridge is 3, 4, and 7 minutes, respectively. Given these conditions, carefully explain how it can be arranged such that it will take exactly 14 minutes for all three people to travel from one side of the bridge to the next.
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
Three people must travel from one side of a bridge to the other. There is one flashlight among them. Anyone who travels across the bridge must use a flashlight. A maximum of two people can travel across the bridge at any particular time. The time it takes for each of the three people to travel over the bridge is 3, 4, and 7 minutes, respectively. Given these conditions, carefully explain how it can be arranged such that it will take exactly 14 minutes for all three people to travel from one side of the bridge to the next.
Given information:
It is given that 3 people must travel from one side of a bridge to the other.
There is only one flashlight among the 3 people. Maximum of 2 people can only travel across the bridge using the flashlight at a particular time.
Consider the 3 people as X, Y and Z.
The time it takes for each of the 3 people to travel over the bridge is 3, 4 and 7 minutes.
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