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jlopez113
23.06.2020 •
Mathematics
The cost of a circular table is directly proportional to the square of the radius. A circular table with a radius of 50cm costs £60. What is the cost of a circular table with a radius of 75cm? Show all your working
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Ответ:
£135 is the correct answer.
Step-by-step explanation:
Let C be the cost of table.
And let R be the radius of table.
Cost of table is directly proportional to square of radius.
As per question statement:
where
is the constant to remove the
.
It is given that
Putting the values of
and
in equation (1):
Putting the values of
and
in equation (1):
Dividing equation (2) by (3):
So, £135 is the correct answer.
Ответ: