Question

Convert each of the following speed into m/sec:

(i) 72 km/hr  = 72 X 5/18= 20 m/s     

         vi) 54 km/hr     

(vii)  81 km/hr   

(viii) 14.4 km/hr

      ​

Answer 1

Answer:

Answer:

Perfect questions for guys interested in maths..

2. The value of x + x(xx) when x = 2 is:

(a) 10, (b) 16, (c) 18, (d) 36, (e) 64

Solution:

x + x(xx)

Put the value of x = 2 in the above expression we get,    

2 + 2(22)

= 2 + 2(2 × 2)

= 2 + 2(4)

= 2 + 8

= 10

Answer: (a)

Step-by-step explanation:

Answer 2

Answer:

(vi) 54 km/hr = 54*5/18 = 15 m/s

(vii) 81 km/hr = 81*5/18 = 22.5m/s

(viii) 14.4 km/hr = 14.5*5/18 = 4.02m/s