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ICSE Class 7 Answered

Rohit covers a distance of 140m with the speed of 75km/h. How much extra time will he take to cover a distance of 400m with the same speed.
Asked by chris.monicapinto | 25 Oct, 2023, 07:15: PM
answered-by-expert Expert Answer
Distance equals 140 space straight m equals 140 over 1000 km equals 7 over 50 km Speed equals 75 space km divided by straight h Then comma space time equals Distance over Speed equals fraction numerator begin display style 7 over 50 end style over denominator 75 end fraction equals fraction numerator 7 over denominator 50 cross times 75 end fraction equals 7 over 3750 hr Now comma space distance equals 400 space straight m equals 400 over 1000 km equals 2 over 5 km space and space speed equals 75 space km divided by straight h Then comma space time equals fraction numerator 2 over denominator 5 cross times 75 end fraction hr equals 2 over 375 hr Extra space time equals 2 over 375 minus 7 over 3750 equals 13 over 3750 hr equals 13 over 3750 cross times 3600 space seconds equals 12.48 space seconds
Answered by Rashmi Khot | 26 Oct, 2023, 09:18: AM

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ICSE 7 - Maths
Rohit covers a distance of 140m with the speed of 75km/h. How much extra time will he take to cover a distance of 400m with the same speed.
Asked by chris.monicapinto | 25 Oct, 2023, 07:15: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 7 - Maths
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