4. A contractor undertakes to dig a canal,
6 kilometre long, in 35 days and employed
90 men. He finds that after 20 days only 2 km
of canal have been dug. How many more men
must he employ to finish the work in time?
Answers
Length of canal = 6 km
Length of canal = 6 kmIn 20 days canal made = 2 km
Length of canal = 6 kmIn 20 days canal made = 2 kmRemaining length of canal = 6 – 2 = 4 km
Length of canal = 6 kmIn 20 days canal made = 2 kmRemaining length of canal = 6 – 2 = 4 kmRemaining time = 35 – 20 = 15 days
In 20 days 2 km canal is made by = 90 men
In 20 days 2 km canal is made by = 90 menIn 1 day 2 km canal is made by = 90 x 20 men
In 20 days 2 km canal is made by = 90 men
In 20 days 2 km canal is made by = 90 menIn 1 day 2 km canal is made by = 90 x 20 men
In 15 days 2 km canal is made by = (90 × 20)/15 men
In 15 days 2 km canal is made by = (90 × 20)/15 menIn 15 days 1 km canal is made by = (90 × 20)/(15 × 2) men
In 15 days 4 km canal is made by = (90 × 20 × 4)/(15 × 2) men = 6 x 10 x 4 men = 240 men
Number of more men to be employed to finish the work in time = 240-90 = 150 men
Answer:
The solution to the problem is illustrated in the picture attached.
Step-by-step explanation:
Refer the picture for the step-by-step explanation.
