Register
One roofer can put a new roof on a house three times faster than another. Working together they can roof a house in 5 days. How long would it take the faster roofer working alone?
10.2k views
3 votes
One roofer can put a new roof on a house three times faster than another. Working together they can roof a house in 5 days. How long would it take the faster roofer working alone?

User Shivam Sharma
by
4.7k points

1 Answer

0 votes

Answer:

if A = 3 B A is 3 times faster than B

B + 3 B = 4 B speed of two working together

S = 4 B *5 = 20 B time to complete roof

It would take B 20 days to complete the roof

A = 20 / 3 = 6.67 days

Check:

B completes 1/20 roof / day

A completes 3/20 roof / day

Together they complete 4/20 or 1/5 roofs / day

User Binara Thambugala
by
4.8k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

5.0m questions

6.5m answers

Other Questions

________ is a measure of the internal energy that has been absorbed or transferred from one body to another, often due to a difference in temperature.
5. What happens to the arrangement of water molecules as ice melts? A Molecules gain enough energy to escape as vapor. B Molecules release enough energy to escape as vapor. C Molecules gain enough energy
A 2.0-N force acts horizontally on a 10-N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50. Suppose that the block now
You’re on a team performing a high-magnetic-field experiment. A conducting bar carrying 4.1 kA will pass through a 1.3-m-long region containing a 12-T magnetic field, making a 60° angle with the field.
A hoop of mass and radius and a solid cylinder of mass and radius are rolling along level ground with the same translational speed. Which object has the greater total kinetic energy?
Link Copied!