A car wash centre washes 10 cars in half an hour. At this rate how many cars can it wash in 4 hours?
A
60
B
20
C
96
D
80
Correct Answer: 80
In half an hour, it can wash = 10 carsin 1 hour, it can was = 10*2 carsin 4 hours, it can wash = 10*2*4 = 80 cars (Ans.)