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Question Number 23508 by math solver last updated on 31/Oct/17

Commented by math solver last updated on 01/Nov/17

$$\mathrm{q}.1?$$

Answered by mrW1 last updated on 31/Oct/17

$${\mathrm{let}}^{\prime }\mathrm{s}\mathrm{say}\mathrm{x}\mathrm{minutes}\mathrm{past}\mathrm{to}10.$$$$(2-\frac{\mathrm{x}}{60})\times 5=\mathrm{x}$$$$10-\frac{\mathrm{x}}{12}=\mathrm{x}$$$$\mathrm{x}=\frac{10\times 12}{13}=9.23\mathrm{m}=9\mathrm{m}14\mathrm{s}$$$$\Rightarrow \left(\mathrm{B}\right)10\mathrm{h}9\mathrm{m}14\mathrm{s}$$

Commented by math solver last updated on 01/Nov/17

$$\mathrm{sir},\mathrm{how}\mathrm{you}\mathrm{write}\mathrm{the}\mathrm{second}\mathrm{line}?$$

Commented by mrW1 last updated on 01/Nov/17

$$\mathrm{the}\mathrm{position}\mathrm{of}\mathrm{minute}\mathrm{hand}\mathrm{is}\mathrm{x}\mathrm{minutes}$$$$\mathrm{after}12$$$$\mathrm{the}\mathrm{position}\mathrm{of}\mathrm{hour}\mathrm{hand}\mathrm{is}(2-\frac{\mathrm{x}}{60})\mathrm{hours}$$$$\mathrm{before}12,\mathrm{the}\mathrm{hour}\mathrm{hand}\mathrm{moves}\mathrm{in}$$$$\mathrm{one}\mathrm{hour}\mathrm{so}\mathrm{much}\mathrm{as}\mathrm{the}\mathrm{minute}\mathrm{hand}$$$$\mathrm{in}5\mathrm{minutes}.$$

Commented by math solver last updated on 01/Nov/17

$$\mathrm{god}\mathrm{bless}\mathrm{you}\mathrm{sir}.$$

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