Question

5. If a bus moves at 112 km/hr, it completes
a journey in 20 minutes. How long would it
take to complete this journey, if the speed
is decreased to 85 km/hr.​

Answer 1

Answer:

20 mins = 20÷60

= 1÷3 hr

112km/hr = 1/3hr

85km/hr = x hr

By cross multiplication,

112 × x = 1/3 × 85

112x × 3 = 85

336x = 85

x = 85 ÷ 336

x = 0.2529761905hr

But you can take it till 3 decimals

So,

x = 0.252hr

= 15.12 min

Hope this helps.

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