Answer:

1. A trencher digs 9m in 3 hours.how long will it take dig 30m?

How long will it take dig 30m

• so that means it ask how hours it take in 30 m

the 30 will divide by 3

so that 10 hours is the answer

Step-by-step explanation:

N = A ÷ B

= 30 ÷ 3

= 10 hours is the long need to dig a 30 m long

hope it help

brainliest please