Question
A man drove at a steady speed of 48 km/h for 5 hours,
and then continued at a constant speed of 40 km/h for the next 4 hours. What is his average speed for the whole journey?Solution
Total distance travelled = 48 X 5 + 40 X 4 = 240 + 160 = 400 km Total time taken = 5 + 4 = 9 hours So, average speed = 400 ÷ 9 = 44(4/9) km/h Hence, option b.
Find the wrong number in the given number series.
28, 40, 63, 98, 147, 224
- Find the wrong number in the given number series.
7, 16, 34, 70, 144, 290 Find the wrong no in the given number series.
11, 18, 32, 60, 112, 228
128, 173, 196, 189, 176, 133
- Find the wrong number in the given number series.
18, 34, 66, 114, 178, 266 Direction: Find the wrong number in given number series.
958, 954, 981, 948, 1299, 1218
9Â Â Â Â 20Â Â Â Â Â 63Â Â Â Â Â Â 255Â Â Â Â Â Â 1285Â Â Â Â Â 7716
...896Â Â Â 2688Â Â Â 336Â Â Â 1008Â Â Â 124Â Â Â 378
Find the wrong number in the given number series,
29, 56, 120, 245, 501, 804Â
4Â Â Â Â Â 6Â Â Â Â Â Â 12Â Â Â Â Â 30 Â Â Â Â Â Â 90 Â Â Â Â Â Â Â 310
...