It takes a boat going upstream 5 hours to cover the same distance, as it would cover in 3 hours going downstream. What is the speed of the boat if the speed of the current is 2 kilometers per hour?

15 kilometers per hour

Step-by-step explanation:

360 different combinations

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.