The first photo shoot takes 3 minutes long and then the following shoots are taken at a rate of 20 seconds/shoot as the model is already at the scene. What is the maximum number of photo shoots taken under 10 minutes ?  Options:
A) 13	B) 14	C) 15	D) 20	E) 22
a must be an integer as it is the number shoots at a rate of 20sec/shoot   3*60 + 20a = 10*60   20a = 420   a = 21   The total number of shoots --&gt;1 +21 = 22 and   23th shoot will be taken at 620 seconds which is above 10 minutes   ANSW22R: 22-- 1 +21= 
<gadget id="calculator">-- 1 +21</gadget>
<output>22</output>
22 and   23th shoot will be taken at 620 seconds which is above 10 minutes   ANSW22R: 22
<result>E</result>
The first photo shoot takes 3 minutes long and then the following shoots are taken at a rate of 20 seconds/shoot as the model is already at the scene. What is the maximum number of photo shoots taken under 10 minutes ?