Lets write, if the following relation are True/ False ( b) 12km : 8 km :: 1 km: 40 min

Let’s write, if the following relation are True / False (d) 15 : 9 :: 35 : 21

Let's write, if the following relation are True/ False ( c) 20 man : 45 man :: 180 rupees : 270 rupees

Let's write, if the following relation are True/ False (a) 4.5 litre : 13.5 litre :: 4 kg : 12kg

Write True or False If 2a = 5b= 8c then a:c = 4:1.

What do the following nean- (f) - 5 km towards south.

Km value is related to

Now, let us find 0.2 m = how much km. 1km = 1000m

A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km. h^(-1) . Finding the market closed he instantly turns and walks back home with a speed of 7.5 km. h^(-1) . What is the average speed of the man over the interval of time (i) 0 to 30 min (ii) 0 to 50 min (iii) 0 to 40 min? [Note: you will appreciate speed as total path length divided by time and not as magnitude of average velocity. You would not like to tell the tired man on his return home that his average speed was zero! ]

A man swims across the river which flows with a velocity of 3 km/h due east.if the velocity of man relative to water is 4 km/h due north, then How long does he take to across the river if the river is 1 km wide?

The fuel charges for running a train are proportional to the square of the speed generated in km/h, and the cost is Rs. 48 at 16 km/h. If the fixed charges amount to Rs. 300/h, the most economical speed is (a) 60 km/h (b) 40 km/h 48 km/h (d) 36 km/h