Question
Vikas covered a certain distance by bike. If he covers
40% of the distance at 40 km/h, 50% of the distance at 25 km/h and the remaining 10% distance at 10 km/h. Find his average speed over the whole distance.Solution
ATQ, Let the total distance be 100x Now, Average speed = (100x)/[{(100x × 40%)/40}+{(100x × 50%)/25}+{(100x × 10%)/10}] = [100x/{(40x/40)+(50x/25)+(10x/10)}] = {100x/(x+2x+x)} = (100x/4x) = 25 km/h
More Time and distance Questions
261 256 246 231 211 ?
...If 6 4 x 5.75 9,
Then, (x²-1) = ?
...61, 48, ?, 35, 87, 22
59, 170, 301, 452, ?, 814
7, 8, 12, 21, 37, ?
[(288)2 ÷ 96 × ?] ÷ 44 = 432
620 632 608 644 596 ?
...61 48 ? ...
6 16 ? 244 1,245 7,506 52,591
Three series are given below. You have to find the values of P, Q and R, then establish a relationship among them.
I: 210, P , 233, 64,...
Relevant for Exams:
