Manju, who works at Ganesh Fruit juice center, prepares 51 glasses of milkshake in 4 min, 18 sec in his first shift. After having a sandwich, he prepares 73 glasses in 7 min 13 sec. After another sandwich, he prepares 112 glasses in 12 min, 24 sec. The container in which the milkshake is prepared contains a maximum of 9 glasses of a drink at a time. Find his approximate average time of preparation of one container of the drink, if he starts with a fresh container each time.
Option (d). In the first shift, he uses the container 6 times.
(45 glasses in 5 rounds and the remaining 6 glasses in the 6th round. Similarly, he prepared 73 glasses in 9 rounds, and 112 glasses in 13 rounds. Hence, the required average
= total time/ total number of rounds = 4 min 18 s + 7 min 13 s + 12 min 24 s = 23 min+55s = 51 seconds(rounded)
6+9+13 = 28