**Mix Review Worksheet-15**

- If the amount is Rs.500 and interest is Rs.100, then principal is:

A. Rs.100 B. Rs.400 C. Rs.600 D. none of these

- A man borrowed Rs.480 from his neighbor. He paid it back after 5 months together with the interest charged at 5% per annum. What amount did he pay back?

A. Rs.512 B. Rs.500 C. Rs.490 D. none of these

- A boy runs at a speed of 8 m/s. How long does he take to cover a distance of 1 km?

A. 100 sec B. 125 sec C. 12.5 hr. D. none of these

- A bus driver completes a trip of 180 km in 4 hrs. If his average is 50 km/hr during the first 3 hrs of trip, then his speed in the final hour is:

A. 45 km/hr B. 35 km/hr C. 50 km/hr D. 30 km/hr

- A cycle travels at a speed of 45 km/h. How far will it travel in 36 minutes?

A. 27 km B. 20 km C. 36 km D. 45 km

- 54 km/hr = ______ m/sec.

A. 54 B. 108 C. 27 D. 15

- A student has to reach his school in 15 minutes. If the school is 800 metres away, at what speed should he walk?

A. 800/15 m/s. B. 1/15 m/s.

C. 8/9 m/s. D. none of these

- The ratio of the least prime number to the least composite number is:

A. 1 : 2 B. 2 : 3 C. 1 : 4 D. 1 : 3

- The ratio of the heights of A and B is 4 : 3. If B is 1.2 m tall, then the height of A is:

A. 0.9 m B. 1.8 m C. 1.6 m D. none of these

- If Rs.60 is divided into two parts in the ratio 2 : 3, then the difference between those two parts is _____.

A. Rs.10 B. Rs.12 C. Rs.5 D. none of these

**Answer Key:**

(1)-B; (2)-C; (3)-B; (4)-D; (5)-A; (6)-D; (7)-C; (8)-A; (9)-C; (10)-B