Question

A formula one race car accelerates with a speed of 105 km/h in the first 15 minutes and then moves at 212 km/h in the next 20 minutes find the distance travelled by the car

Answer 1

Hey there !

Solution :

Given Data :

Speed₁ = 105 km / hr

Time₁ = 15 minutes = 0.25 hours

Speed₂ = 212 km / hr

Time₂ = 20 minutes = 0.3 hours

So we know that,

Distance = Speed * Time

Total Distance Traveled = ( S₁ * T₁ ) + ( S₂ * T₂ )

Total Distance = ( 105 * 0.25 ) + ( 212 * 0.3 )

Total Distance = ( 26.25 km ) + ( 63.6 km )

Total Distance = ( 26.25 + 63.6 ) km

Total Distance = 89.85 km

Hence the total distance covered by the car is 89.85 km.

Hope my answer helped !

Answer 2

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⛆Sᴘᴇᴇᴅ 1 ➾ 105 Kᴍ /ʜʀ
⛆Tɪᴍᴇ 1 ➾ 15 ᴍɪɴ = 0.25 ʜʀꜱ

⛆Sᴘᴇᴇᴅ 2 ➾ 212 Kᴍ / ʜʀ
⛆Tɪᴍᴇ 2 ➾ 20 ᴍɪɴ = 0.3 ʜʀꜱ

➠Dɪꜱᴛᴀɴᴄᴇ = Sᴘᴇᴇᴅ × Tɪᴍᴇ

Tᴏᴛᴀʟ Dɪꜱᴛᴀɴᴄᴇ➾ (S1 × T1) + (S2 × T2)

➾ (105 × 0.25) + (212 × 0.3)
➾ (26.25) + (63.6)
➾ (26.25 + 63.6)

➾ 89.85 Kᴍ...✔