The mean proportional of √3 + √2 and √3 - √2 is : 1. √5 2. 5 3. 1 4. 0

Let x be the mean proportion of : Since, geometrical mean is always positive. ∴ x = 1. Hence, Option 3 is the correct option.

From the following table, find the values of a, b and c:
Number of men 130 70 b 120
Number of days
required to do
the same work a 39 30 c

Number of men	130	70	b	120
Number of days required to do the same work	a	39	30	c

Speed (y km/h)	a	60	150	c
Time taken (x hrs)	8	b	2	6