The slant height of a conical mountain is 2.5 km and the area of its base is 1.54 km2. The height of the mountain is (a) 2.2 km    (b) 2.4 km    (c) 3 km    (d) 3.11 km

The slant height of a conical mountain is 2.5 km and the area of its base is 1.54 km^2 . Taking pi= 22/7 , the height of the mountain is:

1m is equal to 0.1km (b) 0.01km (c) 0.001km (d) 0.0001km

A fisherman can slow 2 km against the stream in 20 min and return in 15 min. What is the speed of the current? (A) 1 km/h (B) 6 km/h (C) 10 km/h (D) 2 km/h

A boat running downstream covers a distance of 10 km in 2 h. While coming back stream the boat takes 5 h to cover the same distance. If the speed of the current is 1.5 km/h. what is speed of the boat in still water? (A) 2.5 km/h (B) 3.5 km/h (C) 5.3 km/h (D) 4.3 km/h

What is the mean thickness of oceanic crust? (1) 5 km (2) 30 km (3) 10 km (4) 70 km

What is the mean thickness of continental crust? (1) 5 km (2) 30 km (3) 10 km (4) 70 km

Speed of a boat along and against the current are 14 km/h and 8 km/h,respectively.The speed of the current is (A) 11 km/h (B) 6 km/h (C) 5.5 km/h (D) 3 km/h.

A man rows 40 km upstream in 8 h and a distance of 36 km downstrean in 6 h. Then, speed of the stream is (A) 0.5 km/h (B) 1.5 km/h (C ) 1 km/h (D) 3 km/h

If a boat goes 7 km upstream in 42 minutes and the speed of the stream is 3 kmph, then the speed of the boat in still water is: a. 4. 2 km//hr b. 9 km//hr c. 13 km//hr d. 21 km//hr