Math, asked by deepaklega143, 2 months ago

A motor starts with the speed of 70 km/h with its speed
increasing every two hours by 10 km/h. In how many hrs
will it cover 450 km/s?​

Answers

Answered by Anonymous
1

Answer:

Distance covered in first 2 hours = (70 × 2) km = 140 km

Distance covered in the next 2 hours = (80 × 2) = 160 km

Remaining Distance = 345 - (140 + 160) → 45 km

Now, speed in the fifth hour = 90 km/h

Therefore, time taken to cover 45 km = 45/90 hr → 1/2 hr

Therefore, total time taken = (2 + 2 + 1/2 ) hr → 4 1/2 hrs

the \: answer \: is \:  \: 4 \frac{1}{2}  \: hrs

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Answered by prakul50
0

INITIAL SPEED = 70 km/hr

IT IS GIVEN THAT THE SPEED IS INCREASING BY 10KM IN EVERY TWO HOURS .

SO, HERE BY WE CAN CONCLUDE THAT THE SPEED IS INCREASING BY 5KM IN EVERY HOUR. (10/2=5)

Now, 70 km/hr is the initial speed

therefore, 450 - 70 = 380

Now , we will divide 380 by 5 OR 10 AS YOUR WISH

380/10 = 38 HOURS

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