Ha! 3 equations of 3 unknown ... :-)Let's see if I still remember ...Sorry, it will take a little bit (English is not my language ...)
Answer:
942
Step-by-step explanation :
so your d is 300 so your r = 300/2= 150
a=3.14*r*r= 3.14*150*150= 70650
c= 3.14*d= 3.14*300= 942
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OR
The curved surface area of solid cylinder is
As we are given that:
Diameter of solid cylinder = 8 cm
Length or Height o solid cylinder = 140 cm
Formula used to calculate the curved surface area of cylinder is:2n x h
Curved surface area of cylinder =2r x h
where,
r = radius of cylinder
h = height or length of cylinder
Radius of cylinder = daimeter
Now putting all the given values in above formula, we get:
Curved surface area of cylinder = 2x 22/7 x 140cm
Curved surface area of cylinder = 
Therefore, the curved surface area of solid cylinder is3520cm^{2}
Answer:d
Step-by-step explanation:
The 2 triangles are similar so corresponding sides are in the same ratio
4/5 = 6 +x / 4x- 8
cross multiply;
30 + 5x = 16x - 32
11x = 62x
x = 5.636
AB = 4(5.636) - 8 = 14.545