arithmetic - a motor bike starts with the speed of 85 kmhr with its speed increasing every one hour by 5 kmhr how much time it will take to cover 295 km - skillgun

Solution: Distance covered in first 1 hour = (85*1) km = 85 km.
distance covered in next 1 hour = (90*1) km = 90 km.
distance covered in next 1 hour = (95*1) km = 95 km.
Remaining distance = 295 -(85+90+95) - 295 -270 = 25 km.
speed in the 4th hour = 100 km/hr.
time taken to cover 25 km = (25/100) hr = 1/4 hr.
.'. total time (1+1+1+1/4) = 3 hrs 15 sec. ( '.' 1/4 hr =15 sec)