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BECE Mathematics 2015 Paper

Question : 7

Total: 40

p \times q \times r = 1197

p=19, q=3

r

Solution:

Concept:

Rearrange the product formula to isolate the unknown variable

r

by using inverse operations.

Explanation:

We are given that

p \times q \times r = 1197

The values are

p = 19

and

q = 3

First, multiply the known values:

19 \times 3 = 57

So the equation becomes:

57 \times r = 1197

To find

r

, divide both sides by

57

r = \frac{1197}{57}

Now simplify the division:

57 \times 20 = 1140

1197 - 1140 = 57

1197 \div 57 = 21

Therefore,

r = 21

Answer:

r = 21

Option A is correct.

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