`A ,\ B\ a n d\ C` can reap a field in `15 3/4` days : `B ,\ C\ a n d\ D` in 14 days: `C ,\ D\ a n d\ A` in 18 days: `D ,\ A\ a n d\ B` in 21 days. In what time can `A ,\ B ,\ C\ a n d\ D` together reap it?

A can do a piece of work in 15 days, which B can do in 10 days. B worked at it for 8 days. A can finish the remaining work in 2 d a y s b. 3 d a y s c. 5 d a y s d. 10 d a y s

In two triangles A B C\ a n d\ A D C , if A B=A D\ a n d\ B C=C Ddot Are they congruent?

In a parallelogram A B C D diagonals A C\ a n d\ B D intersect at O\ a n d\ A C=6. 8\ c m\ a n d\ B D=5. 6 c m . Find the measures of O C\ a n d\ O D .

In a parallelogram A B C D diagonals A C\ a n d\ B D intersect at O\ a n d\ A C=6. 8\ c m\ a n d\ B D=5. 6 c m . Find the measures of O C\ a n d\ O D .

A\ a n d\ Q together can do a piece of work in 10 days, Q\ a n d\ R can do the same work together in 12 days, while A\ a n d\ R can do together in 15 days. How long each will take to do it separately?

A\ a n d\ Q together can do a piece of work in 10 days, Q\ a n d\ R can do the same work together in 12 days, while A\ a n d\ R can do together in 15 days. How long each will take to do it separately?

A and B can do a piece of work in 30 days, while B and C can do the same work in 24 days and C and A in 20 days. They all work together for 10 days when B and C leave. How many days more will A take to finish the work ? 18 d a y s b. 24 d a y s c. 30 d a y s d. 36 d a y s

M ,\ N\ a n d\ P are the mid-points of A B ,\ A C\ a n d\ B C respectively. If M N=3c m ,\ N P=3. 5 c m\ a n d\ M P=2. 5 c m , calculate B C ,\ A B\ a n d\ A C