A car take 7 hours to cover a certain distance at the speed of 48 km/hr . If the speed is decreased by 20 km/hr, how much time will it take to cover the same distance ?
Answers
Answer:
total distance travelled by 48km/ hr : 7hrs × 48 km / hr
= 336km
now spped decressed by 20 km)/ hr so, now speed : 48 - 20 km /hr
28 km /hr time consumed in low speed : 336km÷ 28 km /hr = 12 hrs!!
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Given : A car take 7 hours to cover a certain distance at the speed of 48 km/hr .
To Find : If the speed is decreased by 20 km/hr, how much time will it take to cover the same distance ?
Solution:
Distance = Speed * Time
=> Distance = 48 * 7 km
speed is decreased by 20 km/hr,
new speed = 48 - 20 = 28 km/hr
New time = T hrs
Distance = 28 * T km
28 * T = 48 * 7
=> 4 * T = 48
=> T = 12
Hence 12 hours will be taken
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