# 02 - Cars moving in opposite directions

# 01 - Sound of impact of the bullet hitting the target

# 01 - Example of Mixture Related Problem

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**Problem**

In a class experiment, a student needs 5 liters of 6% solution. He found a 4% and a 10% solution in the laboratory. How many liters of each solution should he mix in order to obtain 5 liters of 6% solution?

A. 3.33 liters of 4% and 1.67 liters of 10% solution

B. 1.67 liters of 4% and 3.33 liters of 10% solution

C. 3.67 liters of 4% and 1.33 liters of 10% solution

D. 1.33 liters of 4% and 3.67 liters of 10% solution

# 13 - Length of Belt Connecting Two Pulleys

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**Situation**

Two flat belt pulleys have a center to center distance of 137 cm, and diameters of 72 cm and 36 cm, respectively. Neglecting the sagging of belt.

- Compute the length of belt if both pulleys will rotate in the same direction.

A. 464.5 cm

B. 553.1 cm

C. 446.0 cm

D. 535.4 cm

- Compute the length of belt if the belt will be cross-connected to make the pulleys rotate in opposite directions.

A. 654.1 cm

B. 465.2 cm

C. 564.2 cm

D. 645.1 cm

- Determine the distance of the point from the center of the bigger pulley where the belt will cross when cross-connected.

A. 91.3 cm

B. 100.4 cm

C. 89.4 cm

D. 98.7cm