twingirls twingirls

20-04-2017
Mathematics

contestada

crew a can tunnel through a mountain in 30 days. if crew B starts from the other side at the same time, the tunnel can be completed in 18 days. how long would it take crew B working alone?

Respuesta :

jaxonehenry jaxonehenry

20-04-2017

39 days because 1/2 of 18 =9 and 9 plus 30 = 39

Answer Link

Otras preguntas

Which word means a band of fibrous connective tissue connecting bones to other bones?

You have 60.00 in your wallet and you want to buy some new cds. if the cd's are 11.00 each, what number of cd's x can you buy?write and solve an inequality. the

What was the Kyoto protocol

Two angles are complementary. The measure of the smaller angle is five less than the measure of the larger angle. What is the measure of the smaller angle?

The diameter of a circle is 41 ft. Find the area of the circle. Use 3.14 for π. Round your answer to the nearest tenth.

At what points in his history does bradford give inner spiritual significance to outward events

an element has atomic number 10 and an atomic mass of 20. how many neutrons are in the atom of this element

Under what three circumstances might ambulatory care be preferable and why

Entrepreneurs and other sellers when buyers purchase the product they sell at prices more than high enough to cover the costs of produ

Australia's economy is MOSTLY a