Which of the following proportions is false
a.) 24/30=20/25
b.) 18/48=20/50
c.) 25/45=75/135
d.) 10/25=40/100

step-by-step explanation:

most likely the answer is a.

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the correct answer option is d. la = πrs.

step-by-step explanation:

we know that for a right cone, the lateral surface area is given by:

lateral area of right cone =

here the value under the square root is equal to slant height so replacing this value by in the formula to get:

lateral area of right cone =

therefore, the correct answer option is d.