A man travels from A to B at a speed of 30 kmph and returns with a speed of 60 kmph. What is the average speed of the man?
A. 47.5
B. 50
C. 45
D. 40
A. 47.5
B. 50
C. 45
D. 40
A. 10000
B. 16400
C. 16800
D. 18000
Explanation:
Let the enrolled votes be x,
Votes cast = (75/100 × x) = 3x/4
Valid votes = (98/100 × 3x/4)
= 147x/200 75/100 × 147x/200 = 9261
=> 441x = (9261 × 800)
=> x = 16800
A. 18 hrs
B. 16 hrs
C. 15 hrs
D. 12 hrs
Explanation:
1/20 + 1/30 = 1/12
1 + 1/3 = 4/3
1 — 12
4/3 — ?
4/3 * 12 = 16 hrs
A. 18
B. 20
C. 24
D. 30
Explanation:
Average = (10 + 15 + 20 + 25 + 30)/5 = 100/5 = 20
A. Rs. 2.50
B. Rs. 3
C. Rs. 3.75
D. Rs. 4
Explanation:
S.I. = (1200 * 10 * 1)/100 = Rs. 120
C.I. = [1200 * (1 + 5/100)2 – 1200] = Rs. 123 Difference = (123 – 120) = Rs. 3.
A. 17 hr
B. 14 hr
C. 12 hr
D. 19 hr
Relative speed = 5.5 – 5 = .5 kmph (because they walk in the same direction)
distance = 8.5 km
time = distance/speed=8.5/.5=17 hr
A. Rs.17684
B. Rs.1684
C. Rs.2522
D. Rs.3408
Explanation:
A = 1600(21/20)3 = 2522