Answer:
Given the following: 4 times 384 can help you find 4 times 5384.
Now, find 
Using Distributive property: 
We can write
as

Apply distributive property we have;

Now, find both products;
we know:
= 21,536
You know the formula for calculating the lateral area of a cylinder with a radius r and height h is S=2*π*r*h
So we have S= 2*π*6*20= 240π
Have fun
Answer:
a) 100/15 = 6.6667 = 6 2/3
b) C = T( 6 2/3)
= T (6 + 2/3)
C = 1T x 6 2/3
= 6 2/3 T
We can show T as time at end of equation or start of brackets