John o ne a gobatsa mokwatla mme o tlhoka go ya kalafišanong ya mmele.  O ile a ya kalafišanong ya mmele dibeke di le 6.  Beke le beke o ne a ya gabedi ka diura di le 2 ka nako.  Fa e le gore dithuto tseo di ja $125 ka ura, kalafišano ya mmele e lopile bokae?

Each pole on a road intersection has 4 street lights. If the number of poles at each intersection is 6, and the road has 4 intersections, calculate the total number of functioning street lights if 20 streetlights from the total number are not working.
Beke le beke o ne a dira 2*2=<<2*2=4>>4 diura tsa kalafišano ya mmele
Ka jalo e lopile 4*125=$<<4*125=500>>500 ka beke
Seno se raya gore o dirisitse 500*6=$<<500*6=3000>>3000
#### 3000 

If the number of poles at each intersection is 6, and the road has 4 intersections, the total number of poles having street lights is 6*4=<<6*4=24>>24
Since each pole on a road intersection has 4 street lights, the total number of streetlights in all the poles is 24*4=<<24*4=96>>96
If 20 streetlights from the total number are not working, the number of functioning street lights is 96-20=<<96-20=76>>76
#### 76