SAT数学备考经典模拟题训练15

>>SAT数学模拟题：SAT数学备考经典模拟题训练15

>>SAT考试辅导

9. 12 litres of water a poured into an aquarium of dimensions 50cm length , 30cm breadth, and 40 cm height. How high (in cm) will the water rise?91sat.cn

(1 litre = 1000cm³)

A. 6

B. 8

C. 10

D. 20

E. 40

10. Six years ago Anita was P times as old as Ben was. If Anita is now 17 years old, how old is Ben now in terms of P ?

A. 11/P + 6

B. P/11 +6

C. 17 - P/6

D. 17/P

E. 11.5P

9.Correct Answer: B

Explanation:

Total volume of water = 12 liters = 12 x 1000 cm3

The base of the aquarium is 50 x 30 = 1500cm3

Base of tank x height of water = volume of water

1500 x height = 12000; height = 12000 / 1500 = 8

10.Correct Answer: A

Explanation:

Let Ben’s age now be B

Anita’s age now is A.

(A - 6) = P(B - 6)

But A is 17 and therefore 11 = P(B - 6)

11/P = B-6

(11/P) + 6 = B

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