a. 2.4 km

b. 2.5 km

c. 3 km

d. 3.6 km

**Answer:** a. 2.4 km

a. 40 min

b. 1 hr

c. 1 hr 15 min

d. 1 hr 30 min

**Answer:** c. 1 hr 15 min

a. 8.5 km/h

b. 9 km/h

c. 10 km/h

d. 12.5 km/h

**Answer:** c. 10 km/h

a. 2 : 1

b. 3 : 2

c. 8 : 3

d. Cannot be determined

**Answer:** c. 8 : 3

20. A boatman rows | 3 | km against the water current in 11 | 1 | minutes. Find his speed in still water. |

4 | 4 |

b. 3

c. 4

d. 5

**Answer:** d. 5