Answer :
1/2 hour = 105 miles
i hour = 105 x 2 = 210 miles
1/4 hour = 105 ÷ 2 = 52.5 miles
210 + 52.5 = 262.5 miles
i hour = 105 x 2 = 210 miles
1/4 hour = 105 ÷ 2 = 52.5 miles
210 + 52.5 = 262.5 miles