Pula e ntsi e ne ya tlala mo mafelong a a metsi mme ya gogola Phineas Kgokong dimitara di le 200 go tswa kwa legaeng la gagwe kwa lefelong le le ditlhaka.  Go boela gae, o tla tlhoka go tlola le go thuma go boela morago.  Fa a tlola mo lefatsheng ka lobelo lwa dimetara di le 20 ka motsotso, mme a thuma mo metsing ka lobelo lwa dimetara di le 10 ka motsotso, go tla tsaya Phineas nako e e kae, ka metsotso, go boela gae fa sephatlo sa sekgala se le mo lefatsheng mme sephatlo se sengwe se le mo metsing?

Louise is an artist and needs to apply a coat of varnish to her latest paintings. Usually it takes 7 minutes for the coat of varnish to dry on one painting. However, today she is using a new varnish and it takes 12 minutes for the coat to dry. How much longer will it take for the coat of varnish on 6 paintings with the new varnish to dry as it would with the old varnish?
Sephatlo sa dimetara di le 200 ke 200/2=<<200/2=100>>dimetara di le 100.
Dimitara di le 100 ka lobelo lwa dimetara di le 20 ka motsotso ke 100/20=<<100/20=5>>metsotso e le 5.
Dimitara di le 100 ka lobelo lwa dimetara di le 10 ka motsotso ke 100/10=<<100/10=10>>metsotso e le 10.
Ka kakaretso, go tla tsaya Phineas 5+10=<<5+10=15>>metsotso e le 15 go boela gae.
#### 15 

Usually, the varnish on all 6 paintings would be dry in 7*6=<<7*6=42>>42 minutes
With the new varnish, all 6 paintings would be dry in 12*6=<<6*12=72>>72 minutes
With the new varnish, it will take 72-42=<<72-42=30>>30 more minutes
#### 30