In ten hours, a guy completes a voyage. He goes at a speed of 21 km/hr for the first half of the voyage and 24 km/hr for the second. Calculate the total distance travelled in kilometres.
A. 220 km
B. 224 km
C. 230 km
D. 230 km
Answer:B
In ten hours, a guy completes a voyage. He goes at a speed of 21 km/hr for the first half of the voyage and 24 km/hr for the second. Calculate the total distance travelled in kilometres.
A. 220 km B. 224 km C. 230 km D. 230 km
Explanation: 1/2)x/21 + (1/2)x/24 = 10 x/21 + x/24 = 20 x/21 + x/24 == 168 x 20 x 15 ,x = 168 x 20 /15 = 224 kilometres.