Question

Suppose it takes four pipes to fill a water tank in 70 minutes. How long will it take to fill the tank if

seven pipes are used?

A. 55 minutes

B. 50 minutes
C. 45 minutes
D.40 minutes​

Answer 1

Step-by-step explanation:

By the principle of inverse proportion

4×70=7×x

⇒x=

7

4×70

=40 min

Answer 2

Answer:

D. 40 minutes

I hope it help you....