4. Find the volume of a water tank which is 250cm long, 160cm wide
and 80cm deep.
A 20 litres
B. 32 litres
C. 40 litres
D. 320 litres
E 3200 litres​

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?

Which of the following is the graph of y= square root -x-3