Answer:
30 mins
Step-by-step explanation:
<em>speed = distance/ time </em>
speed of car A
= 20/ 12 km/ min
= 5/ 3 km/ min
also, speed of car A = speed of car B
speed of car B = 5/ 3 km/ min = 50km / time taken (in mins)



=> t = 30 mins
Answer:
456 students
Step-by-step explanation:
38% = 0.38
1200 x 0.38 = 456
There are 8 sets of 21 cups in 168 cups so 9 times 8 is 72