Question

A car travels 90 km in 2 whole 1upon2 hours.
how much time is required to cover 30 in 2 hours with the same speed . how much this time is​

Answer 1

Correct Question ⤵

A car travels 90 km in $2 \frac{1}{2}$ hours.

a) How much time is required to cover 30 km with the same speed ?

b) Find the distance covered in 2 hours with the same speed ?

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Solution ⤵

a) How much time is required to cover 30 km with the same speed ?

Time is Unknown and Distance is Unknown.

Therefore,

$2 \frac{1}{2}$ hours = $\frac{5}{2}$ hours

=> $\frac{5}{2}$ × 60 Minutes

=> 150 Minutes.

90 km is covered in 150 Minutes.

Therefore, 1 Km covered in $\frac{150}{90}$

=> 30 Km covered in $\frac{150}{90}$ ×30

=> Thus, 30 Km covered in 50 Minutes .

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b) Find the distance covered in 2 hours with the same speed ?

Time is Unknown and Distance is Unknown.

Therefore, Distance Covered in

$2 \frac{1}{2}$ hours => 90 Minutes

Therefore, Distance Covered in 1 hour

=> 9 ÷ $\frac{5}{2}$

Reciprocal them✔

=> 9 × $\frac{5}{2}$

=> 36 Km

Distance Covered in 2 Hours

=> 36 × 2 = 72 km

=> Thus, 72 Km covered in 2 hours .

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