After 38 liters of petrol were poured into the tank, it was still 5% empty. How much petrol must be poured into the tank in order to fill it?
A. 38 liters
B. 40 liters
C. 38.5 liters
D. 2 liters
Explanation:
95% ———– 38
5% ———— ? => 2 liters
A. 38 liters
B. 40 liters
C. 38.5 liters
D. 2 liters
Explanation:
95% ———– 38
5% ———— ? => 2 liters
A. Rs. 14000
B. Rs 16000
C. Rs. 18000
D. Rs. 12400
Explanation:
10/100 × B = 20/100 × c
=>B = 2c =>B = (2 × 2000) = 4000
5/100 × A = 5/100 × B =>A = 3B = (3 × 4000) = 12000
(A + B + C) = Rs (12000 + 4000 + 2000) = Rs. 18000
A. 1.5km/hr
B. 3km/hr
C. 1km/hr
D. none
Explanation:
Let the speed of stream be x km/hr
Speed upstream = (2-x) km/hr = 2-x = 1 => x = 1 km/hr
A. 4/3 times its radius
B. 2/3 times its radius
C. Equal to it’s radius
D. Equal to it’s diameter
A. 55 kg
B. 62 kg
C. 56 kg
D. None
Explanation:
25x + 46 = 26(x – 5)
x = 176
A. 4
B. 5
C. 6
D. 7
Explanation:
Let the number off boys in the group originally be x.
Total weight of the boys = 30x
After the boy weighing 35 kg joins the group, total weight of boys = 30x + 35
So 30x + 35 + 31(x + 1) = > x = 4