Question

Jim and Elaine were driving from Toronto to Ottawa, a distance of 400 kilometres. Jim drove 1⁄4 of the way. Then Elaine took over and drove 1⁄2 of the remaining distance. How far did they still have to travel?

(a) 100 km (b) 150 km (c) 200 km (d) 50 km (e) none of these

could you explain the solution?

Answer 1

B)150 km

Explanation:

The total distance is 400km

and jim drove 1/4 of this distance so

400 x 1/4 = 100km

then subtract this from the total distance 400 - 100 = 300km

Elaine drove 1/2 of this remaining distance

300 x 1/2 = 150 km

Add this with the first result

100 + 150 = 250 km

this is the total disrance that they have treveled

how much do they have to go

400 - 250 = 150km meaning the answer is b