One pump can fill a swimming pool in 8 hours and another pump can fill it in 10 hours. if both pumps are opened at the same time, how many hours will it take to fill the pool?

It will take hours to fill the pool.

Step-by-step explanation:

Since we have given that

Number of hours first pump takes = 8 hours

Number of hours second pump takes = 10 hours

If both pumps are opened at the same time,

Work done by first pump =

Work done by second pump =

According to question,we get that

So, it will take hours to fill the pool.

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation: