the ratio between the speed of two trains is 7:8.if the second train runs 400 km in 5 hours, the speed of frist train?

Question

the ratio between the speed of two trains is 7:8.if the second train runs 400 km in 5 hours, the speed of frist train?​

Anna · Answer

Answer:      Step-by-step explanation:   So, the speed of the second train is 8 × 12.5 = 100 kmph. And the speed of the second train is 7 × 12.5 = 87.5 kmph.

Gabriella

one side of a cubic box in 0.3m. How much will it cost to paint the outer surface of the box at the rate of 70rs per sq. metre?

5
2
Multiply.
(i) (a – b + c) by (a – b -c)
(iii) (2×2 – 5x + 3) by (5×2 – 6x – 4)
(ii) (x® – 4×2 + 5x –

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