If there are 200 questions in a 3 hr examination. Among these questions are 10 type A problems, which requires twice as much as time be spent than the rest of the type B problems. How many minutes should be spent on type A problems?
Pick
A) 17.14286 min
B) 62 min
C) 70.1346 min
D) 74 min
E) 76.1346 min
x=time for type B prolems   2x=time for type 17.14286 min problem   total time=3hrs=180min   190x+10*2x=180   x=180/210   x=0.72   time taken for type 17.14286 min problem=10*2*0.857143= 
<gadget id="calculator">10*2*0.857143</gadget>
<output>17.14286</output>
17.14286min   17.14286 minNSWER:17.14286 min
<result>A</result>
If there are 200 questions in a 3 hr examination. Among these questions are 10 type A problems, which requires twice as much as time be spent than the rest of the type B problems. How many minutes should be spent on type A problems?